AP Physics Energy

How far does a car that pulled with a 5,000 N force go if 18,000 J of work is done on it?

• 3.8 m

• 3.7 m

• 3.2 m

• 3.6 m

Tags

NGSS.MS-PS3-5

What is the weight of an object if 75 J of work is done to lift it uniformly 6.0 m

• 13 N

• 450 N

• 1.3 kg

• 130 kg

Tags

NGSS.HS-PS3-1

Which of the following would be a measure of Work?

• 13 W

• 14 m

• 45 J

• 10 N

A 2 kg ball is attached to a 0.80 m string and whirled in a horizontal circle at a constant speed of 6 m/s. The work done on the ball during each revolution is...

• zero

• 16 J

• 72 J

• 90 J

If L, M, and T denote the dimensions of length, mass, and time, respectively, what are the dimensions of power?

• L²M/T²

• M²L/T²

• M²L/T³

• ML²/T³

A man stands in an elevator as it begins to ascend. Does the normal force from the floor do work on the man?

• Yes, and the work done will be positive.

• Yes, and the work done will be negative.

• Yes, but the sign can’t be determined.

• No.

Tags

NGSS.HS-PS2-1

What is the equation for kinetic energy?

• K=(m)(h)(10)

• K=1/2(k)(x)^2

• K=1/2(m)(v)

• K=1/2(m)(v)^2

Tags

NGSS.HS-PS2-1

What is the potential energy of a ball, held at a height of 45 m, with a mass of 2-kg.

• U_g= 400 N

• U_g= 600 N

• U_g= 700 N

• U_g= 900 N

Tags

NGSS.MS-PS3-2

What is the equation for spring potential energy?

• U_s= (k)(x)²

• U_s= (k)(x)

• U_s= 1/2(k)(m)

• U_s= 1/2(k)(x)²

Which of the following objects has the most kinetic energy?

• A 20 kg toddler running at 5 m/s

• A 50 kg toddler running at 30 m/s

• A 90 kg toddler running at 30 m/s

• A 100 kg toddler running at 2 m/s

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4