- It takes a force of 22 N to move a 6.0 kg steel slider at constant velocity along a horizontal dry steel rail of mass 4.0 kg.What is the coefficient of kinetic friction for these steel surfaces? a. 0.37 c. 1.8 b. 0.56 d. 2.7
- A small elevator weighing 1.2times 10^3N is accelerating upward. The tension in the cable is 2.0times 10^3N and the frictional resistance to the motion is 5.0times 10^2N What is the net force acting on the elevator? a. 3.7times 10^3N[up] C. 1.3times 10^3N[up] b. 2.7times 10^3N[up] d. 3.0times 10^2N[up] A C B D
- 12. Two people, A and B, are dragging a canoe across a level beach using light ropes. Person A applies a force of 40 N and person B applies a force of 80 N. The force of friction exerted by the beach on the canoe is 100 N.What is the net force on the canoe? 220 N [backward] 20 N [forward] 220 N [forward] 20 N [backward]
- MULTIPLE -CHOICE QUESTION True or false - X-rays are like light waves but have lower energy and can pass through materials. True False
- A net force of 25N[south] acts on a wagon of mass 75 kg. The acceleration of the wagon is a. 0.33m/s^2[south] c. 50m/s^2 [south] b. 3.0m/s^2 [south] d. 1.0times 10^2m/s^2 [south]
