Mechanical Energy

Pulling a wagon will most likely change all of the following EXCEPT its −

• motion
• position
• direction
• mass

The measure of the force of gravity acting on an object is ─

• weight
• length
• volume
• mass

Which of the following would not affect a baseball game?

• mechanical energy
• friction
• gravity
• magnetism

Is the ability of something to cause change in itself or other things

• Energy

• Sound

• Friction

• Motion

Is the energy associated with the chemical bonds that link atoms in a pure susbtance.

• Thermal energy

• Chemical energy

• Electrical energy

• Potencial energy

We have two object, A and B, in isolation. If object B gains 500 J, what must have happened to body A?

• The energy gained by object B its depends on the temperature

• The energy gained by object B must be more as the energy lost by object A

• The energy gained by object B must be the same as the energy lost by object A

• None of the above.

The potential energy of an object increases 50 J. If there is no friction, how much kinetic energy has tranformed?

• 100 JOULES

• 50 JOLUES

• 50 JOULES

• 200 JOULES

A 69 kg ski jumper jumps and reaches a heigth of 10.7 m. What potential energy does she have?

• None of the above

• 7000 Joules

• 7235 Juloes

• 7235 Joules

Indicate if the following phrases are true (T) or false (F): Total energy is conserved in an isolated system.

• True

• False

How far will an object move in 12 seconds if it is traveling at a velocity of 8 m/s?

• 96 m
• 0.7 m
• 20 m
• 4 m