PHYSICS-M3 SMEP FINAL EXAM

Which of the following statements are true about potential energy?

• Both gravitational and elastic potential energy are dependent upon the speed of an object.

• Moving objects cannot have potential energy.

• None of these

• Potential energy is the energy stored in an object due to its position.

What are the units for Work?

• Newtons

• Kilograms

• Joules

• Moles

The energy of motion is...? 

• Mechanical

• Potential

• Kinetic

• Infinite

A force exerted over a distance to move an object is the definition of _________.

• power

• work

• momentum

• Watt

At which point on the roller coaster is the kinetic energy at its maximum?

• A

• B

• C

• D

A person is pushing a 10 kg shopping cart at a velocity of 5 m/s. They increase their speed to 7 m/s to get around someone and then keep going that velocity. Overall, was work done on the shopping cart?

• Yes

• No

A simple machine is (a)  

• a device that makes work easier
• a device that makes work harder
• an energy that makes work easier
• a energy that makes work harder

Which is not a type of simple machine?

• spring

• screw

• pulley

• wedge

How does a driver use a steering wheel as a simply machine?

• The driver is using a wheel and axle to reduce the amount of force.

• The driver is using a lever to steer the vehicle.

• The driver is using a pulley and lever to steer the vehicle.

• The driver is using a wheel and axle to reduce the amount of work needed to steer the vehicle.

How does a movable pulley make lifting objects easier?

• The amount of force needed is doubled.

• the amount of force needed is increased.

• the amount of force needed is reduced.

• the amount of force needed stays the same.