The 4,450kg truck is traveling at 30.50m/s when the brakes on all its wheels are applied, causing it to skid for a distance of 22m before coming to rest. Calculate the constant horizontal force developed in the coupling C, as well as the frictional force developed between the tires of the truck and the road during this time. The combined mass of the boat and trailer is 2,250kg

The tractor-trailer unit is moving down the incline with a speed of 5.6 mi/hr when the driver brakes the tractor to a stop in a distance of 5.7 ft. Estimate the percent increasenin the hitch-force component which is parallel to the incline, compared with the force present at steady speed. The cart and its load combined weigh 560 Ib. State any assumptions. 6. 15 Answer:n =

The spring is not stretched or compressed when “s=0.8m" and the 11 kg block which is subjected to a force of 105 N has a speed of 5.5 m/s down the smooth plane. Using "THE PRINCIPLE OF WORK AND ENERGY", find the distance "s" when the block STOPS. k = 200 N/m 5 m/s F = 100 N 30°

M = A frisbee is thrown such that its final angular velocity is w = 9 after being in flight for t = 2 s. As it rad S flies, the wind applies a constant moment, causing the frisbee to rotate faster. If the frisbee was initially at rest, determine the moment of the wind and the work done by said moment. Assume the frisbee can be modelled as a disk with mass m = = 0.15 kg and that it rotates about its center of gravity G. The frisbee has a radius of r = 0.12 m. UM = N.m r J G M

The elevator E and its freight have a total mass of 400kg. Hoisting is provided by the motor M and the 150-kg block C. If the motor has an efficiency of ε =0.85, determine the power that must be supplied to themotor when the elevator is hoisted upwards at aconstant speed of VE = 4 m/s.   Please show every single step of the process and the free body diagrams thanks

Determine the constant force P required to cause the 0.58-kg slider to have a speed v2 = 0.55 m/s at position 2. The slider starts from rest at position 1 and the unstretched length of the spring of modulus k = 300 N/m is 195 mm. Neglect friction. 200. 200 mm 230 mm mm 270 mm m 17

When s = 0.6 m, the spring is relaxed, and the 10 kg block, which issubjected to a force of 125 N, has a speed of 4 m/s on the smooth plane.Find the distance s when the block stops.

The small collar of mass m = 0.46 kg is released from rest at A and slides down the curved rod in the vertical plane with negligible friction. If b = 0.47 m, and h = 1.22 m, and if the velocity of the collar as it strikes the base Bis 4.61 m/s after release of the collar from rest at A, calculate the work Q of friction. What happens to the energy which is lost? A B Answer: Q = i

The crate, which has a mass of 245 kg is subjected to the action of the two forces. If it is originally at rest determine the distance it slides in order to attain a speed of 12 m/s. The coefficient of kinetic friction between the crate and the surface is 0.18 800 N 30° 4 1000 N

Determine the speed v which the 690-kg four-man bobsled must have in order to negotiate the turn without reliance on friction. Also find the net normal force N exerted on the bobsled by the track. 23° Answers: V= i N = i -p=58 m m/s kN