Impulse and momentum

When a cannon fires a cannonball, the cannon will recoils backwards because:

• Energy if the cannonball and cannon is conserved

• Momentum of the cannonball and cannon is conserved

• Energy of the cannon is greater than the energy of the cannonball

• Momentum of the cannon is greater than the energy of the cannonball

Tags

NGSS.HS-PS2-2

In an elastic collision, if the momentum is conserved, then which of the following statements is true about kinetic energy?

• Kinetic energy is also conserved

• Kinetic energy is gained

• Kinetic energy is lost

• None of the above

A sailboat of mass m is moving with a momentum p. How would you represent its kinetic energy in terms of these two quantities?

• $K\ =\frac{p^2}{2m}$

• $K\ =\ \frac{1}{2}mp^2$

• $K\ =\ mp$

• $K\ =\ \frac{mp}{2}$

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

The area under the curve on a Force versus time ( F vs t) graph represents

• Impulse

• Momentum

• Work

• Kinetic energy

Two objects collide and bounce off each other. Linear momentum is:

• Definitely conserved

• Definitely not conserved

• Conserved only if the collision is elastic

• Conserved only if the environment is friction less

Tags

NGSS.HS-PS2-2

Change in momentum is called:

• Force

• Impulse

• Acceleration

• Torque

Tags

NGSS.HS-PS2-2

The rate of change of momentum is called:

• Force

• Impulse

• Acceleration

• Torque

Tags

NGSS.HS-PS2-1

Momentum depends upon:

• Force act on the body

• Mass of the body

• Velocity of the body

• Both mass and velocity of the body

Tags

NGSS.HS-PS2-2

An alternate unit to the equation below is:

 $kgms^{-1}$  

•  $Js$  

•  $Ns$  

•  $N\ m$  

•  $N$  

Tags

NGSS.HS-PS2-2

SI unit of impulse is:

• $kgms^{-2}$

• $Ns$

• $N$

• None of these