2nd Term Practice

Differences in gravitational potential energy depend on an object’s ________.

• mass and speed

• height and speed

• mass and height

• mass only

Which equation is correct?

• Mechanical energy = potential energy – kinetic energy

• Mechanical energy = potential energy + kinetic energy

• Mechanical energy = potential energy x kinetic energy

• Mechanical energy = kinetic energy - potential energy

According to the law of conservation of energy, the total amount of energy in the universe ________.

• remains constant

• changes constantly

• increases

• decreases

Which of the following is an example of potential energy?

• A rolling ball                                                             

• A stretched rubber band

• A moving car

• A falling rock

The region around a magnet where the magnetic forces act is the ________.

• electromagnetic pole

• magnetic field

• magnetic pole

• magnetic domain

In a simple electric circuit, what provides energy to the circuit?

• Battery

• Switch

• Wire

• Bulb

Magnetic force is strongest at:

• The center of a magnet                                         

• The sides of a magnet

• The end (poles) of a magnet

• Equally throughout the magnet

Which object has the most kinetic energy?

• A 10 kg rock moving at 2 m/s

• A 2 kg object moving at 10 m/s

A light bulb is powered by a single D-cell. What happens if two D-cells connected end-to-end are used?

• The light bulb burns brighter because the current will be smaller.

• The light bulb burns dimmer because the current will be larger.

• The light bulb burns brighter because the current will be smaller.

• The light bulb burns brighter because the current will be larger.

The highest potential energy at point ------------.

• A

• B