30

20. How much force must be applied to push a 1.35 kg book across the desk at constant speed if the coefficient of kinetic friction is 0.30?

Calculate the maximum value of b for which the rope will not start sliding down the slope.

B4

Those data are for questions 15 to 20 The 5-lb rod AB with a length of l=2 ft is hanging in the vertical position. A 2-lb block , sliding on a smooth horizontal surface with a velocity of 10 ft/s, strikes the rod at its end B. e = 0.8. The goal is to find the linear velocity of the block and the angular velocity of the bar just after collision. Step 5: Find the linear velocity of the block after impact. Give your answer in ft/s with 1 decimal.

Calculate the maximum value of b for which the rope will not start sliding down the slope.

Solve it correctly please.

Part a) Determine the force exerted by his seat on a 170-lb rider at B and D Part b) Determine the minimum value of the radius of curvature at E if the roller coaster is not to leave the track at that point.

The coefficient of kinetic friction between the60-kg crate and the ground is uf = 0.3. The crate starts from rest, and P = 225 N .(Figure 1) Part A Determine the velocity of the crate when t = 4s Express your answer to three significant figures and include the appropriate units. HẢ v = Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining • Part B Determine the distance the crate travels when 4 s Express your answer to three significant figures and include the appropriate units. Figure HÀ S = Value Units Submit Request Answer 30° Provide Feedback