Physics

Question 1

Formula triangle for speed.

Answer 1

D on the top
S and T on the bottom

D is for density
S is for speed
T is for time

Question 2

Calculate the speed of an object that travels 15m in 5 seconds.

Answer 2

3 m/s

Question 3

Speed is….

Answer 3

The distance an object travels in one unit of time.

Question 4

Acceleration is….

Answer 4

The rate at which velocity changes.

Question 5

Velocity is…..

Answer 5

Speed in a given direction

Question 6

The velocity of an object can change if……

Answer 6

The direction changes

Question 7

The acceleration can……
A)…
B)…
C)…

Answer 7

A) speed up
B) change in direction
C) decrease in speed

Question 8

Why can acceleration change in direction?

Answer 8

Because the definition of acceleration is the rate at which velocity changes. Velocity is about direction and speed…

Question 9

An unbalanced force will cause an object to….

Answer 9

Start moving, stop moving, or change direction

Question 10

Name the unbalanced force that causes a toy car to stop rolling.

Answer 10

Friction and air resistance.

Question 11

What is Newton’s first law of motion also known as……

Answer 11

Newtons law of inertia

Question 12

What does newtons 1st law of motion state?

Answer 12

An object stays in motion and objects at rest stay at rest unless acted upon by a unbalanced force.

Question 13

Newton’s second law of motion states that….

Answer 13

The greater the unbalanced force acting on an object, the greater the acceleration of the object.

Question 14

If there are two objects, object A and B, if A has bigger mass than B, and the amount of force acting on both are 100N, then which will have the greatest acceleration, A or B?

Answer 14

B , because it is smaller in mass so when the same amount of force is used on it, it moves more, therefore greater acceleration.

Question 15

Newton’s third law of motion states…..

Answer 15

If one object exerts a force on a second object, then the second object will exert a force of equal strength in the opposite direction on the 1st object.

Question 16

Newton’s third law states….. For every action, there is a —– and ——– reaction.

Answer 16

Equal, opposite

Question 17

Explain how a rocket shows Newton’s third law of motion.

Answer 17

The force of the exhaust from the back of the rocket pushes backwards and the engine is pulled front. Causing a backward push making the rocket go up.

Question 18

Distance over time graph……
A) if the line is going up slanted……
B) if the line is horizontal….
C) if the line is going down slanted…..

Answer 18

A) constant speed
B) no motion
C) constant speed going in opposite direction, so going to where it cam from.

Question 19

Speed over time graph also known as ——– over time graph.
A) slanted line going up
B) horizontal line
C) slanted line going down

Answer 19

Velocity.

A) speeding up
B) constant speed
C) slowing down