Energy & Momentum Test

The equation to calculate momentum is

• p=mv
• p=1/2mv²
• p=mgh
• p=mg

The momentum of an object depends upon the object's ___________&_____________.  

• size and shape
• mass and speed
• mass and veloctiy
• mass and energy

(Think about impulse) Most modern vehicles have airbags. This reduces collision injuries by...

• reducing the driver's change in momentum

• increasing the driver's change in momentum

• increasing the force of impact

• increasing the time of impact

A 50 kg ball rolls down the street at 5 m/s. Calculate the momentum of the ball. 

• 55 kg*m/s
• 100 kg*m/s
• 250 kg*m/s
• 500 kg*m/s

If an object has a momentum of 40 kgm/s and a mass of 60 kg, what is it's velocity?

• 2400 m/s

• 1.5 m/s

• 240 m/s

• .67 m/s

Energy stored from result of stretching or compressing

• Chemical Potential Energy

• Elastic Potential Energy

• Gravitational Potential Energy

Energy of movement.

• Electromagnetic Kinetic Energy

• Mechanical Kinetic Energy

• Thermal Kinetic Energy

The unit for energy is

• joules

• kg

• kg·m/s

• m/s

• m/s²

A measure of how hard it is to stop a moving object is called ____________.

• acceleration

• energy

• momentum

Which statement is TRUE of the law of conservation of momentum?

• Momentum disappears when objects collide.

• Total momentum before a collision is the same afterwards.

• Total momentum increases after a collision.