P10: Forces And Motion

Question 1

What will happen to a car if it is in equilibrium?

Answer 1

Stay still or continue at a constant velocity

Question 2

What does force equal?

Answer 2

Mass X Acceleration

Question 3

Calculate the force of an object that has a mass of 6.0kg and an acceleration of 3.0m/s

Answer 3

6 x 3 = 18N

Question 4

What is inertia?

Answer 4

The tendancy for an object to stay at rest or continue at a constant motion

Question 5

What is the difference between mass and weight?

Answer 5

Weight is the force acting on an object due to gravity, meassured in Newtons (N)

Mass is the quantity of matter in an object, meassured in kilograms (KG)

Question 6

How do you calculate weight?

Answer 6

Mass X Acceleration due to gravity

Question 7

A man has a mass of 90kg, what is is weight if the acceleration due to gravity is 10m/s?

Answer 7

90 x 10 = 900N

Question 8

What is stopping distance?

Answer 8

Thinking distance + Braking distance

Question 9

What is thinking distance?

Answer 9

The distance travelled between the driver realising they have to brake and actually braking

Question 10

What is braking distance?

Answer 10

The distance taken to stop once the brakes are applied

Question 11

What factors may affect the braking distance?

Answer 11

• If it is icy or wet
• If the car is broken or faulty
• The speed of the car

Question 12

What is momentum?

Answer 12

A property of a moving object which depends on how much mass the object has and how fast it is moving

Question 13

What is the equation for momentum?

Answer 13

Mass X Velocity

Question 14

Calculate the momentum of an object with a mass of 50kg and a velocity of 2.5m/s?

Answer 14

50 x 2.5 = 125kgm/s

Question 15

What is an elastic object?

Answer 15

An object that regainst its shape when the forces deforming it are removed.

Question 16

What is hookes law?

Answer 16

The extension of a spring is directly proportinal to the force applied, provided its limit of proportinality is exceeded.