Momentum Equations

______________ is a force acting over some amount of time to cause a change in momentum

• Work

• Impulse

• Energy

• Power

Tags

NGSS.HS-PS2-2

A baseball player hits a baseball, changing its momentum by 15 kgm/s. The net force on the ball is 7100N. How long does the bat maintain contact with the ball?

• 0.0021 s

• 106500 s

• 473.3 s

• 2 s

Answer explanation

$F\cdot t\ =\ \Delta p$

Tags

NGSS.HS-PS2-1

A tennis player hits a ball and give is a change in momentum of 3.3 kg m/s over 5.0 milliseconds. What is the magnitude of the net force on the tennis ball?

• 0.66 N

• 6.6 N

• 66.0 N

• 660 N

Answer explanation

There are 1000 milliseconds in every 1 second. (milli=1000)

Tags

NGSS.HS-PS2-1

The momentum of an object depends on the object's ____ and ___.

• mass and velocity

• mass and position

• weight and position

• none of the above

Answer explanation

p = m x v

Tags

NGSS.HS-PS2-2

The Law of Conservation of Momentum states that the total momentum of a closed system is:

• Increasing over time

• Decreasing over time

• Constant, if no external forces act on it

• Zero

Tags

NGSS.HS-PS2-2

In any collision (crash) the ______ is ALWAYS constant

• Total Momentum

• total speed

• total Velocity

• Energy

Tags

NGSS.HS-PS2-2

According to the Law of Conservation of Momentum, in the absence of external forces, the total momentum of a system

• Increases over time

• Decreases over time

• Remains constant

• Becomes zero

Tags

NGSS.HS-PS2-2

In a collision between two objects, which of the following statements is true regarding momentum?

• The total momentum before the collision is always greater than the total momentum after the collision.

• The total momentum before the collision is equal to the total momentum after the collision.

• The total momentum before the collision is always less than the total momentum after the collision.

• Momentum is not conserved in any type of collision.

Tags

NGSS.HS-PS2-2

A cow with mass m is moving with a velocity v. The cow - sensing danger - speeds up to 3v. The cow's momentum ____.

• remains the same

• Gets cut in half

• Gets cut in third

• Gets tripled

Answer explanation

p = m x v

Tags

NGSS.HS-PS2-2

A(n) ____________ causes and is equal to a change in momentum

• force

• impact

• impulse

• collision

Tags

NGSS.HS-PS2-2