Multiple Choice
A heavy suitcase is carried by a porter down a flight of stairs. The work done on the suitcase by the Earth's gravity is
A) zero.
B) positive.
C) negative.
D) unknown; more information is needed to work out the answer.
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q23: A ball of mass 0.50 kg is
Q24: A 10-kg toy car moving at 5.0
Q25: A crate follows a semicircular path of
Q26: An apple falls to the ground from
Q27: A heavy suitcase is carried by a
Q29: A force of variable magnitude acting on
Q30: A projectile is launched at an angle
Q31: Car A is three times lighter than
Q32: A spring is stretched 10.0 cm when
Q33: The work-energy theorem is applied to the