Physics A Intro Quiz

What are the units for energy?

• Watts (W)
• Volts (V)
• Amps (A)
• Joules (J)

Which of these is a measurement of speed?

• 25 miles per hour

• 30 feet

• 45 seconds

• 16 pounds

Complete the following statement regarding motion:

"Every action has..."

• "an equal and opposite reaction."

• "self-evident truths that all men are created equal."

• "the square root of the hypotenuse."

• "an introductory, body, and conclusion paragraphs."

• 20⁸

• 10¹⁵

• 10²

• 10⁸

Mathematical Equivalence

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What is inertia?

• The measure of mass in an object.

• The equal and opposite action produced by an action.

• The amount of energy stored in a moving object.

• How fast an object is moving.

What is the law of conservation of energy?

• Energy can not be created nor destroyed.

• E = m c²

• The energy into a system is equal to the energy out of a system.

• Every energy has an equal and opposite energy.

What is potential energy?

• The amount of energy stored in a battery.

• Another term for kinetic energy.

• The energy stored in an object by its position.

• The energy of motion.

A box sitting on the ground weighs 300 lbs and is lifted by a 250 lb force along a steel cable.

Which best describes the motion of the box?

• The box will remain stationary on the ground.

• The box will be lifted upwards at a constant speed.

• The box will be lifted upwards with an increasing speed.

• The box will pull downwards on the cable with 300 lbs.

A laboratory technician is standing on a scale in an elevator at the top of a building. The scale displays "150 lbs."

What will the scale display when the elevator starts to move downwards?

• Less than 150 lbs.

• More than 150 lbs.

• 150 lbs.

• 0 lbs.