Momentum, Impulse and Force

What is impulse equal to?

• The change in momentum

• The product of force and time

• Both A and B

• The product of mass and acceleration

Answer explanation

Impulse is equal to the change in momentum, which is the product of force and time. Therefore, the correct answer is 'Both A and B'.

Tags

NGSS.HS-PS2-2

A force of 10 N acts on a ball for 3 seconds. What is the impulse given to the ball?

• 30 Ns

• 13 Ns

• 10 Ns

• 3 Ns

Answer explanation

The impulse given to the ball is equal to the force multiplied by the time. In this case, the force is 10 N and the time is 3 seconds, so the impulse is 30 Ns. Therefore, the correct answer is 30 Ns.

Which of the following statements is true about the conservation of momentum?

• Momentum is only conserved in elastic collisions.

• Momentum is not conserved when external forces act on a system.

• Momentum of a system changes when it accelerates.

• Momentum is conserved in both elastic and inelastic collisions in an isolated system.

Answer explanation

Momentum is conserved in both elastic and inelastic collisions in an isolated system.

Tags

NGSS.HS-PS2-2

Which of the following best describes impulse?

• The change in velocity of an object

• The change in momentum of an object

• The force applied to an object over a distance

• The energy transferred to an object

Tags

NGSS.HS-PS2-2

How does applying a larger force over a shorter time period affect the impulse delivered to an object?

• It decreases the impulse.

• It increases the impulse.

• It has no effect on the impulse.

• It changes the direction of the impulse.

Tags

NGSS.HS-PS2-1

What is the momentum of a 55kg person running at 7 m/s? Do not include units

Mathematical Equivalence

OFF

Tags

NGSS.HS-PS2-2

A 0.2 kg ball is thrown with a velocity of 15 m/s. What is the impulse required to stop the ball?

• 3 Ns

• 0 Ns

• 15 Ns

• 30 Ns

Tags

NGSS.HS-PS2-2

If a 100kg car has a momentum of 2000 kg m/s, how fast is it going? Do not include units

Mathematical Equivalence

ON

Tags

NGSS.HS-PS2-2

A 50kg skater has a momentum of 500 kg m/s. How fast are they going? Do not include units

Mathematical Equivalence

ON

Tags

NGSS.HS-PS2-2

If a car of mass 1500 kg is moving at a velocity of 20 m/s, what is its momentum?

• 30,000 kg m/s

• 15,000 kg m/s

• 7500 kg m/s

• 300 kg m/s

Answer explanation

The momentum of a car is calculated by multiplying its mass and velocity. In this case, the car's momentum is 30,000 kg m/s, which is the correct choice.

Tags

NGSS.HS-PS2-2