Work and Energy

This graph describes the motion of a 60 kg dog. Calculate its kinetic energy.

• 1,800 J

• 27,000 J

• 54,000 J

• 432,000 J

• 864,000 J

Tags

NGSS.HS-PS3-1

A man pushes this 50ºF box 5 meters across the floor. He does this by applying 20 N for 4 seconds. How much work does he do?

• 16 J

• 25 J

• 80 J

• 100 J

• 125 J

Tags

NGSS.HS-PS2-1

When my velocity triples, my kinetic energy increases by ______ times.

• 9
•  3 
• 1.5
• 4.5

Tags

NGSS.MS-PS3-1

A 60.0-kg ball of clay is tossed vertically in the air with an initial speed of 4.60 m/s.  Ignoring air resistance, what is the change in its potential energy when it reaches its highest point? 

• 0 J
• 635 J
• 280 J
• 2700 J

Tags

NGSS.HS-PS3-1

A football is kicked off the ground a distance of 50 yards downfield. Neglecting air resistance, which of the following statements would be INCORRECT when the football reaches the highest point?

• all of the ball's original kinetic energy will have been changed into potential energy

• the ball will have been in the air one-half of its total flight time

• the vertical component of the velocity will be equal to zero

• the balls horizontal velocity will be the same as when it left the kickers foot

Calculate the KE of a runner that has a mass of 80 kg and is running at a velocity of 8 m/s

• 5120 J
• 320 J
• 640 J
• 2560 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

A child applies a constant 20 newton force along the handle of a wagon which makes an angle of 25 degrees with the horizontal. How much work does the child do in moving the wagon a horizontal distance of 4.0 meters?

• 34 J

• 80 J

• 73 J

• 5.0 J

Which combination of fundamental units can be used to express energy? 

• kg * m^2/s 
• kg * m^2/s^2
• kg * m/s
• kg * m/s^2 

A horizontal force of 5.0 newtons acts on a 3.0 kg mass over a distance of 6.0 meters along a horizontal, frictionless surface. What is the change in kinetic energy of the mass during its movement over the 6.0 meter distance? 

• 90. J
• 30 J.
• 15 J
• 6.0 J 

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

Jayden climbs to the top of the Empire State Building (h = 381m). He drops a quarter (m = 5.67 grams). What is the quarter's velocity just before it hits the ground?

• 61.5 m/s

• 7,475 m/s

• 6.1 m/s

• 86.5 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4