3F - 2. Momentum and Impulse

What is the formula for momentum?

• p = mass × speed

• p = mass - speed

• p = mass + speed

• p = mass / speed

What does velocity represent?

• The speed of an object in a time interval

• The mass of an object

• The force applied to an object

• The change in momentum

What is the unit of momentum?

• N

• kg

• m/s

• kg m/s

What does a vector quantity have that a scalar does not?

• Direction

• Mass

• Volume

• Speed

According to Newton's second law, what is the relationship between force and momentum?

• Force equals change in momentum over time

• Force equals mass times velocity

• Force equals mass divided by acceleration

• Force equals velocity times time

What happens to an object's velocity when a resultant force is applied?

• It changes

• It remains constant

• It decreases to zero

• It becomes negative

What is impulse?

• Mass multiplied by velocity

• Change in momentum

• Force multiplied by time

• Acceleration multiplied by time

What is the law of conservation of momentum?

• Momentum is always positive

• Momentum can be created or destroyed

• Momentum is the same as energy

• Total momentum remains constant in an isolated system

If two trolleys collide and stick together, what happens to their total mass?

• It becomes negative

• It is the sum of their individual masses

• It remains the same

• It decreases

What is the resultant force if the change in momentum is 10 kg m/s and the time is 2 seconds?

• 10 N

• 2 N

• 5 N

• 20 N