PHYS SCI B Unit 4 Test Review

Fill in the blanks to accurately describe the energy transfer in a hydroelectric dam.

​ (a)   ​ ​energy in water becomes ​​ (b)   energy as it moves through turbines, which turn ​​ (c)   energy into ​ (d)   energy that spins a generator, which changes ​ (e)   energy into electricity.

• Potential
• kinetic
• mechanical

A skater does down a ramp. Which statement best describes the change in energy?

• The skater's potential energy and kinetic energy increase and decrease together.

• The skater's potential energy is changed to mechanical energy.

• The skater's kinetic energy decreases as he goes down the ramp.

• The skater’s potential energy decreases as his kinetic energy increases.

A bus carries 50 passengers from Las Vegas to Los Angeles going an average speed of 80 miles per hour. On the drive back, the bus carries 25 passengers and travels at the same average speed. What happens to the bus's kinetic energy?

• On the drive back, the bus has more kinetic energy.

• The plane’s kinetic energy is the same on both flights.

• The bus’s kinetic energy is changed to potential energy during the drive.

• On the drive back, the bus has less kinetic energy.

• 891,000 J

• 1,782,000 J

• 4,400,000 J

• 8,800,000 J

Which object has kinetic energy?

• A cat sleeping on the couch

• A book on a shelf

• A dog playing fetch

• A cup of water on the table

Ms. Ross pushed a cart full of teaching supplies to her car. After emptying the cart, she pushed it back to the school. She pushed the cart at a speed of 1 meter per second each way. Which is the best prediction?

• The cart had less kinetic energy on the way to the car.

• The cart had less kinetic energy on the way back to the school.

• The cart’s kinetic energy depends on Ms. Ross's mass.

• The cart had the same kinetic energy going each way.

A student throws a tennis ball into the air. When does the ball have the most potential energy?

• when the ball reaches its highest point

• when the ball is in the student's hand

• when the ball reaches its greatest velocity

• when the ball hits the ground

What is the best description of a bowling ball hitting a pin?

• All of the kinetic energy in the bowling ball is transferred to the pin.

• Kinetic energy in the pin is transferred to the bowling ball. 

• Most of the kinetic energy in the bowling ball is transferred to the pin.

• Potential energy is transferred from the bowling ball to the pin.

Mathematical Equivalence

ON

Mathematical Equivalence

ON