A 10.0 kg box slides down a 30.0 degrees incline at a rate of 0.40 m/s^2. What is the coefficient of kinetic friction. * O 0.53 O 0.24 O 0.48 O 0.58
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- A small diamond of mass 10.0 g drops from a swimmers earring and falls through the water, reaching a terminal velocity of 2.0 m/s. (a) Assuming the frictional force on the diamond obeys f=bv2 , what is b ? (b) How far does the diamond fall before it reaches 90 percent of its terminal speed?A 72.0 kg sprinter starts a race with an acceleration of 2.40 m/s2. What is the net external force (in N) on him? (Enter the magnitude.)A 52.0 N block rests on an inclined plane at an angle of 25.0 (N of E) . If the block is pushed with 10 N of force down the ramp and u = 0.556 , what's the block's initial acceleration?
- What is the force required to accelerate a 50.0 kg box across a frictionless surface at 0.50m/s2?A block rests on an inclined plane at an angle of 25.0 (N of E) . If the block is pushed with 10 N of force down the ramp and u = 0.556 , what's the block's initial acceleration?What is the force (N) of 2.0 kg brick moving through the air at 12 m/s2?
- A 3.69x103 kg train is moving at a constant speed of 10m/s on a horizontal railroad track that offers an overall frictional force of 500N. Calculate (a) it's acceleration, (b) the engine force, (c) the distance traveled in 20 seconds, (d) its acceleration if it changes its speed to 30 m/s, (e) the engine force in this case?In the figure, the net external force on the 24 kg mower is known to be 51 N. f=28N v=1.8 m/s a. If the force of friction opposing the motion of 28N what force in newtons is the person acting on the mower? b. Suppose the mower is moving at 1.8 m/s when the force F is removed. How far will the mower go before stopping in m?A horizontal force of 92.7 N is applied to a 54.5 kg crate on a rough, level surface. If the crate accelerates at 1.23 m/s2, what is the magnitude of the force of kinetic friction (in N) acting on the crate?
- A 20kg wagon is pulled along the level ground by a rope inclined at 30degrees above the horizontal. A friction force of 30N opposes the motion. What is the magnitude of the pulling force if the wagon is moving with (a) constant speed, (b) an acceleration of 0.400 m/s2?Tim pushes a 195kg lawnmower with a force of 850N at an angle of 35 degrees with respect to the horizontal. If it accelerates along the level grou D at 2.90 m/s2, what is the coefficient of Kinetic Friction between the mower and the ground.A 2.2 kg crate is being dragged across the floor by a horizontal force of 34 N. If it accelerates at a rate of 1.55 m/s2, a) what is the fricition force acting on the crate? b)..whtat is the coefficient of friction?