Force and Motion

Question 1

What is the definition of force?

Answer 1

energy that is used to push or pull

Question 2

True or False: A net force of zero means an object is at rest.

Answer 2

False

Question 3

Fill in the blank: The formula for calculating force is _____.

Answer 3

F = ma

Question 4

What is translational motion?

Answer 4

Translational motion refers to the movement of an object from one location to another.

Question 5

What are the two main types of motion in physics?

Answer 5

Translational motion and rotational motion.

Question 6

Multiple Choice: Which of the following is an example of linear motion?

Answer 6

A car driving straight down a road.

Question 7

Define projectile motion.

Answer 7

Projectile motion is a form of motion experienced by an object or particle that is thrown near the earth’s surface and moves along a curved path under the action of gravity.

Question 8

True or False: In projectile motion, the horizontal and vertical motions are independent of each other.

Answer 8

True

Question 9

What is the shape of the trajectory of a projectile?

Answer 9

Parabolic.

Question 10

Fill in the blank: The acceleration due to gravity is approximately _____.

Answer 10

9.81 m/s²

Question 11

What is an inclined plane?

Answer 11

An inclined plane is a flat surface that is tilted at an angle to the horizontal.

Question 12

Multiple Choice: What is the primary advantage of using an inclined plane?

Answer 12

It reduces the amount of force needed to lift an object.

Question 13

True or False: An object on an inclined plane experiences both gravitational and normal forces.

Answer 13

True

Question 14

What is circular motion?

Answer 14

Circular motion is the motion of an object traveling around a circular path.

Question 15

Fill in the blank: The force that keeps an object moving in a circular path is called _____.

Answer 15

centripetal force

Question 16

Multiple Choice: Which of the following factors affects the centripetal force required for circular motion?

Answer 16

The mass of the object and the radius of the circular path.

Question 17

What is uniform circular motion?

Answer 17

Uniform circular motion is when an object moves in a circular path at a constant speed.

Question 18

True or False: In uniform circular motion, the velocity is constant.

Answer 18

False

Question 19

What is the formula for centripetal acceleration?

Answer 19

a_c = v²/r

Question 20

Fill in the blank: The net force acting on an object in motion is called _____.

Answer 20

net force

Question 21

What is the difference between speed and velocity?

Answer 21

Speed is a scalar quantity, while velocity is a vector quantity that includes direction.

Question 22

Multiple Choice: Which of the following describes constant acceleration?

Answer 22

An object’s velocity increases by the same amount in each time interval.

Question 23

What is the equation of motion for an object under constant acceleration?

Answer 23

s = ut + 0.5at²

Question 24

True or False: An object can have a constant speed while accelerating.

Answer 24

True

Question 25

Fill in the blank: The point where all forces acting on an object balance is called the _____.

Answer 25

equilibrium point

Question 26

What does Newton's first law of motion state?

Answer 26

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Question 27

Multiple Choice: Which of the following is an example of Newton's second law?

Answer 27

Force equals mass times acceleration.

Question 28

What is the relationship between mass and weight?

Answer 28

Weight is the force of gravity acting on an object's mass.

Question 29

Fill in the blank: The unit of force in the SI system is the _____.

Answer 29

Newton

Question 30

What is the formula for calculating work done by a force?

Answer 30

W = Fd cos(θ)

Question 31

True or False: Work is done when a force is applied but there is no displacement.

Answer 31

False

Question 32

What is kinetic energy?

Answer 32

Kinetic energy is the energy of an object due to its motion.

Question 33

Fill in the blank: The formula for kinetic energy is _____.

Answer 33

KE = 0.5mv²

Question 34

Multiple Choice: Which factor does NOT affect the gravitational force between two objects?

Answer 34

The color of the objects.

Question 35

What is the principle of conservation of energy?

Answer 35

Energy cannot be created or destroyed, only transformed from one form to another.

Question 36

True or False: Momentum is a vector quantity.

Answer 36

True

Question 37

What is the formula for momentum?

Answer 37

p = mv

Question 38

Fill in the blank: The change in momentum is equal to the _____.

Answer 38

impulse

Question 39

Multiple Choice: Which of the following is NOT a type of friction?

Answer 39

Magnetic friction.

Question 40

What is static friction?

Answer 40

Static friction is the frictional force that prevents two surfaces from sliding past each other.

Question 41

True or False: Kinetic friction is generally less than static friction.

Answer 41

True

Question 42

What is the role of the normal force?

Answer 42

The normal force acts perpendicular to the surfaces in contact and supports the weight of an object.

Question 43

Fill in the blank: The acceleration of an object in free fall is equal to _____.

Answer 43

g

Question 44

What is the effect of air resistance on falling objects?

Answer 44

Air resistance opposes the motion of falling objects and reduces their acceleration.

Question 45

Multiple Choice: Which of the following statements is true about forces?

Answer 45

Forces can cause an object to accelerate, decelerate, or change direction.

Question 46

What is the formula for gravitational force?

Answer 46

F = G(m₁m₂/r²)

Question 47

True or False: The gravitational force between two objects increases as the distance between them decreases.

Answer 47

True

Question 48

Fill in the blank: The center of mass of an object is the point where _____.

Answer 48

mass is evenly distributed

Question 49

What is centripetal force?

Answer 49

Centripetal force is the net force required to keep an object moving in a circular path.

Question 50

True or False: Centripetal force acts outward on a body moving in a circle.

Answer 50

False

Question 51

What formula is used to calculate centripetal force?

Answer 51

F_c = (mv^2)/r, where m is mass, v is velocity, and r is radius.

Question 52

Fill in the blank: Centripetal force is always directed ___ the center of the circular path.

Answer 52

toward

Question 53

What is torque?

Answer 53

Torque is a measure of the rotational force applied to an object.

Question 54

True or False: Torque depends on the angle at which the force is applied.

Answer 54

True

Question 55

What is the formula for torque?

Answer 55

τ = rFsin(θ), where τ is torque, r is the distance from the pivot point, F is the force, and θ is the angle.

Question 56

What does the term 'rotational equilibrium' mean?

Answer 56

Rotational equilibrium occurs when the sum of all torques acting on an object is zero.

Question 57

In rotational equilibrium, what is the net torque?

Answer 57

The net torque is zero.

Question 58

Multiple Choice: Which of the following is a condition for rotational equilibrium? A) Net force is zero B) Net torque is zero C) Both A and B D) None of the above

Answer 58

C) Both A and B

Question 59

What is the relationship between centripetal force and mass?

Answer 59

Centripetal force increases with an increase in mass if velocity and radius remain constant.

Question 60

Fill in the blank: The unit of torque is ___ in the SI system.

Answer 60

Newton-meter (Nm)

Question 61

True or False: An object in uniform circular motion experiences a net force.

Answer 61

True

Question 62

What is the direction of the net force acting on an object in circular motion?

Answer 62

The net force is directed toward the center of the circle.

Question 63

Multiple Choice: Which of the following factors does NOT affect centripetal force? A) Mass B) Velocity C) Radius D) Color

Answer 63

D) Color

Question 64

What happens to centripetal force if the radius of the circular path is doubled?

Answer 64

Centripetal force is halved if mass and velocity remain constant.

Question 65

True or False: Torque can be positive or negative depending on the direction of rotation.

Answer 65

True

Question 66

What is the effect of increasing the angle θ in the torque formula?

Answer 66

Increasing θ up to 90 degrees increases torque, but beyond that, torque decreases.

Question 67

What is the condition for an object to be in translational equilibrium?

Answer 67

The net force acting on the object must be zero.

Question 68

Fill in the blank: An object in rotational equilibrium will not ___ without an external torque.

Answer 68

rotate

Question 69

Multiple Choice: Which of the following is NOT a type of centripetal force? A) Gravitational B) Tension C) Friction D) Magnetic D) Electrical

Answer 69

D) Electrical

Question 70

What is the significance of the radius in circular motion?

Answer 70

The radius determines the curvature of the path and affects the required centripetal force.

Question 71

True or False: Torque is independent of the point of application of the force.

Answer 71

False

Question 72

What is the effect of mass on torque if the distance from the pivot is constant?

Answer 72

Torque increases with an increase in mass.

Question 73

What is the unit of centripetal force in the SI system?

Answer 73

Newton (N)

Question 74

Fill in the blank: The centripetal acceleration is given by the formula ___ a_c = v^2/r.

Answer 74

a_c

Question 75

What is the relationship between torque and rotational inertia?

Answer 75

Torque is directly proportional to the rotational inertia and angular acceleration.

Question 76

Multiple Choice: Which of the following statements is true? A) Centripetal force acts along the tangent of the circle B) Centripetal force is a type of friction C) Centripetal force is always directed outward D) Centripetal force is required for circular motion

Answer 76

D) Centripetal force is required for circular motion

Question 77

What is the formula for calculating centripetal acceleration?

Answer 77

a_c = v^2/r

Question 78

True or False: An object in circular motion will continue to move in a straight line if centripetal force is removed.

Answer 78

True

Question 79

What does it mean for an object to have zero net torque?

Answer 79

It means the object is in rotational equilibrium.

Question 80

In circular motion, how is displacement defined after each full revolution?

Answer 80

Displacement is zero.

Question 81

What happens when the centripetal force acting on an object in circular motion is removed?

Answer 81

The object continues in the direction of its velocity vector.