Momentum

What do objects increasing in speed not have?

• Momentum

• Mass

• Balanced forces

How do you calculate momentum?

• m = mv

• p = mv

• m = p ÷ v

What are the units of momentum?

• N

• kg ms

• kg m/s

What does conservation of momentum mean?

• When objects collide the total momentum stays the same

• When objects collide the momentum is that of the largest object

• When objects collide the momentum is that of the smallest object

What is the formula for calculating force?

• Time ÷ change in momentum

• Change in momentum ÷ time

• Change in momentum × time

If an object with a mass of 12 kilograms is moving at 10 metres per second, what is its momentum?

• 120 kg m/s

• 120 kgms

• 1.2 kg m/s

If an object undergoes a change in momentum of 10 kg m/s in 3 seconds what is the force?

• 3.3 kg m/s

• 3.3 N

• 3.3 s

Newton's Second Law of Motion can be summarised by which equation?

• M = F/a

• F = ma

• F = m/a

What does Newton's Third Law of Motion state?

• Objects with balanced forces acting on them will stay at rest or in constant motion

• F = ma

• If A exerts a force of B, then B exerts an equal but opposite force on A

Which car safety features absorb kinetic energy?

• Seat belts and air bags

• Seat belts and crumple zones

• Seat belts, crumple zones and air bags