forces

Question 1

Give the 6 examples of scalers:

Answer 1

Mass
Temperature
Speed
Energy
Distance
Time

Question 2

What do scaler quantities only have?

Answer 2

magnitude

Question 3

Give the 6 vector quantities:

Answer 3

Displacement
Weight
Force
Velocity
Acceleration
Momentum

Question 4

What do vector quantities both contain?

Answer 4

magnitude and direction

Question 5

What is a force?

Answer 5

a push or pull that acts on an object due to the interaction with another object.

Question 6

What is a force?

Answer 6

a vector

Question 7

What is the unit for force?

Answer 7

Newton (N)

Question 8

What is a contact force?

Answer 8

when two objects are physically touching.

Question 9

Give the examples for a contact force:

Answer 9

tension
friction
air resistance
normal contact force

Question 10

What is a non contact force?

Answer 10

objects are physically seperated

Question 11

Give the examples of a non-contact force:

Answer 11

electrosatic force
gravity
magnetic force

Question 12

What is weight?

Answer 12

a vector

Question 13

What does the mass of an object tell us?

Answer 13

how much matter an object has in it

Question 14

What is mass?

Answer 14

a scaler

Question 15

What is the unit for mass?

Answer 15

Kg

Question 16

What is weight of an object?

Answer 16

the force acting on an object due to its gravity.

Question 17

What is the unit of weight?

Answer 17

Newtons (N)

Question 18

What is the equation for weight?

Answer 18

weight = mass x gravitational field strength

Question 19

What is the unit for gravitational field strength?

Answer 19

N/kg

Question 20

what is the centre of mass?

Answer 20

The weight of an object can be considered to act at a single point.

Question 21

What is a resultant force?

Answer 21

a single force that has the same effect as all the original forces acting together

Question 22

How do we work out a resultant force?

Answer 22

larger force - small force

Question 23

What is the equation for work done?

Answer 23

work done = force x distance

Question 24

What is the unit for work done?

Answer 24

J

Question 25

What is the unit for distance?

Answer 25

m

Question 26

What does the distance tell us?

Answer 26

how far an object moves

Question 27

What is the equation for speed?

Answer 27

speed = distance / time

Question 28

What is the unit for speed?

Answer 28

m/s

Question 29

What is the unit for distance?

Answer 29

m

Question 30

What is the unit for time?

Answer 30

s

Question 31

what is the normal walking speed?

Answer 31

1.5 m/s

Question 32

What is the running speed?

Answer 32

3 m/s

Question 33

What is the cycling speed?

Answer 33

6 m/s

Question 34

What is the speed of a car on the main road?

Answer 34

13m/s

Question 35

What is the speed of a fast train in the UK?

Answer 35

50m/s

Question 36

What is the speed of a cruising aeroplane?

Answer 36

250m/s

Question 37

what is the speed of sound in air?

Answer 37

330m/s

Question 38

What is the equation for the distance travelled?

Answer 38

distance = speed x time

Question 39

How do we calculate the gradient?

Answer 39

distance travelled / time

Question 40

What is velocity?

Answer 40

speed in a given direction.

Question 41

What is acceleration?

Answer 41

tells us the change in it's velocity over a given time.

Question 42

What is the equation for velocity?

Answer 42

acceleration = change in velocity / time

Question 43

What is the unit for acceleration?

Answer 43

m/s2

Question 44

What is the unit for velocity?

Answer 44

m/s

Question 45

What is the equation for acceleration at a constant rate?

Answer 45

(final velocity)2 – (initial velocity)2 = 2 × acceleration × distance

Question 46

What does Newtons first law describe?

Answer 46

the effect that forces have on an object

Question 47

What is Newtons first law?

Answer 47

an object remains in the same state of motion unless a resultant force. If all the forces are balanced, the resultant force is zero.

Question 48

When will the velocity change?

Answer 48

if a resultant force is acting on the object

Question 49

What is Newtons second law?

Answer 49

the acceleration of an object is directly proportinal to the resultant force of an object but inversely proportional to the mass of an object.