Module 4 Test

The amount of kinetic energy a moving object has depends on its mass and its __________ .

• Conservation of Energy
• simple machines
• friction
• mechanical advantage
• Velocity

A car engine changes chemical potential energy into the _____________ energy of the moving car.

• Potential
• Kinetic
• position
• constant

What is the kinetic energy of a 100 kg cart moving at a speed of 7 m/s? K.E. = 1/2 m v^2

• 700 Joules
• 350 Joules
• 2,450 Joules
• 45 Joules

What is the gravitational potential of a 10 kg sack of groceries on a shelf 1 m above the floor? GPE = m x 9.8 m/s² x h

• 8 Joules
• 98 Joules
• 70 Joules
• 12 Joules

A hammer falls off a rooftop and strikes the ground with a certain kinetic energy. How would its kinetic energy compare if it fell from a roof twice as tall?

• It would have half the kinetic energy.
• The kinetic energy would be the same
• The kinetic energy would increase 9.8 m/s^2 more
• The kinetic energy would double.

If a box is pushed 10 meters with a force of 20 Newtons, what is the amount of work? W=FxD

• 200 N
• 2 N
• .5 N
• 24 N

The energy stored in foods and fuels is ______________ potential energy.

• Conservation of Energy
• chemical
• simple machines
• friction
• mechanical advantage

The law of _______________states that energy cannot be created or destroyed.

• Conservation of Energy
• chemical
• simple machines
• friction
• mechanical advantage

A compound machine is a combination of two or more ____________________ .

• Conservation of Energy
• chemical
• simple machines
• friction
• mechanical advantage

The number of times a machine multiplies the effort force is the ________________ of the machine

• Conservation of Energy
• chemical
• simple machines
• friction
• mechanical advantage