Multiple Choice
A man pushes an 80-N crate a distance of 5.0 m upward along a frictionless slope that makes an angle of 30°with the horizontal.The force he exerts is parallel to the slope.If the speed of the crate is constant, then the work done by the man is:
A) -200 J
B) 61 J
C) 140 J
D) 200 J
E) 260 J
Correct Answer:
Verified
Correct Answer:
Verified
Q22: The mechanical advantage of any machine is:<br>A)the
Q23: A particle starts from rest at time
Q24: In the plot shown of force vs.distance,
Q25: Three identical springs (X, Y, Z)are arranged
Q26: Two objects with masses, m<sub>1</sub> and m<sub>2</sub>,
Q28: Which of the following groups does NOT
Q29: Camping equipment weighing 6000 N is pulled
Q30: A Boston Red Sox baseball player catches
Q31: An object moves in a circle at
Q32: A baseball is hit high into the