all black with mass 0.0700 kg slides in a vertical cir r track. There is no friction bětween the track and t mal force that the track exerts on the block has m force that the track exerts on the block when it is

blem 3 ne mass of the concrete block is 880kg, how big are the forces in two ropes? A) 400N B) 500N CC)300N D)CD) 600N E)Ⓡ F₂ 20 F 120 400 N { F)350N

The block in the figure below has a mass of 5.9 kg and it rests on an incline of angle 0. m 07 You pull on the rope with a force F = 38 N. Assume the incline is smooth and determine the angle of the incline if th moves with constant speed.

Suppose your car was mired deeply in the mud and youwanted to use the method illustrated  to pull itout. (a) What force would you have to exert perpendicular tothe center of the rope to produce a force of 12,000 N on thecar if the angle is 2.00°? In this part, explicitly show how youfollow the steps in the Problem-Solving Strategy for Newton’slaws of motion. (b) Real ropes stretch under such forces.What force would be exerted on the car if the angle increasesto 7.00° and you still apply the force found in part (a) to itscenter?

A rope attached to a 35-lb crate passes around two fixed pegs as shown in Fig. to a wall by a second cord. The coefficient of friction be- tween the two crates is 0.25; between the crate and the floor, 0.25; and between the rope and the pegs, 0.20. Determine the minimum force Pmin that must be used to cause mo- The 45-lb crate is attached tion. P 45 lb 35 lb

The 200-lb crate of Fig is being moved by a rope that passes over a smooth pulley. The coefficient of friction between the crate and the floor is 0.30. Determine the vaue of h for which impending motion by slipping and by tipping would occur simultane- ously. 2 ft 5ft P

the 50 lb block rests on the rough surface for which the coefficient of kin etic friction is uk=0.2

A 1.5 kg block resting ina rough flat surface is pulled by a string.  The string makes an angle of 20 degress with the horizontal.  The coefficient of static friction between the blodk and the surface is 0.35.  What is the maximum tension in the string to keep the block unmoved?