Blocks A, B, and C are being pushed across a frictionless table by a hand that exerts a constant horizontal force FH. Block A has mass 2M, block B has mass 3M, and block C has mass M. Name all the horizontal forces acting and rank them in order, from the largest to the smallest. 2M A Frictionless table 3M B M C
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- If the mass of the block is M -3.8 kg, what is the magnitude of the frictional force ?If an automobile moving along a road at constant velocity experiences a force of 400 N in the forward direction, how much frictional force opposes the car’s motion? Explain briefly.In the figure, two blocks are connected over a pulley. The mass of block A is 14.0 kg and the coefficient of kinetic friction between A and the incline is 0.140. Angle 0 of the incline is 42.0°. Block A slides down the incline at constant speed. What is the mass of block B? Frictionless, massless pulley A B Number i Units
- A 50-N object sits on a 20° rough incline. It is attached to a 10-N object over a pulley. The coefficients of static and kinetic friction are 0.70 and 0.20, respectively. We want to know whether or not the object will slide. With that in mind, fill out the following table, leaving any quantity that is not given as a variable: Force x-component y-component Tension Normal Weight Friction maA 3.0 kg object is moving to the right at a constant speed of 2.0 m/s. What is the net force on it? O ON 6 N 20 N not enough information 30 NYou and your friend are moving a 82kg box across the floor at a constant speed. You are pushing on the box parallel to the ground with a force of 62N. Your friend has a rope tied to the box and they are pulling it at an angle of 37° to the ground with a force of 32N. Construct the free body diagram showing the force acting on the box in order to find the magnitude of normal force the floor excerts on the box.
- A horse pulls a cart with force F.As a result of this force the cart accelerates with constant acceleration. The magnitude of the force that the cart exerts on the horse cannot be determined without knowing the mass of the horse. greater than the magnitude of F equal to the magnitude of F 1s zero newtons. less than the magnitude of FWe start with some review problems A crate of mass 20.0 kg rests on a level surface, with a coefficient of kinetic friction 0.219. You push on the crate with an applied force of 297 N. What is the magnitude of the crate s acceleration as it slides? 12.70 m/s^2 14.85 m/s^2 6.35 m/s^2 20.79 m/s^2James pulls a 1.8 kg dynamics cart up a ramp that is inclined 25o to the horizontal. The cart is initially at rest but is then pulled up the ramp with a force sensor attached to James. The force sensor exerts a force on the cart parallel to the ramp. Negligible friction acts on the cart. What force is required for James to pull the cart up the ramp at an acceleration of 2.5 m/s2?
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