Chapter 13, Problem 65P

The car has a mass of 2000kg. Determine the shortest time it takes for it to reach a speed of 90 km/hr, starting from rest, if the engine drives the front wheels, whereas the rear wheels are free rolling. The coefficient of friction between the wheels and road is s=0.4, k=0.3. Neglect the mass of the wheels. What are the reactions at the front and rear wheels while the car is accelerating

If the 200 kg crate starts from rest and travels a distance of 10 m up the plane in 6s, determine the magnitude of force acting on the crate. The coefficient of kinetic friction between the crate and the ground is μ=0.4. 30° P 30°

The 300-N block is at rest on the horizontal plane before the force P is applied at t=0. Find the velocity and position of the block when t=5 sec. The magnitude of P is 80t N, where t is the time in seconds, and its direction is constant. The coefficients of static and kinetic friction are μs = 0.4 and μk = 0.2, respectively. FIND: A. Find t (time in seconds) when the block starts to move B. Find a (acceleration) in terms of t (time in seconds) C. Find v (velocity) in terms of t (time in seconds) D. Find x (displacement) in terms of t (time in seconds) E. Find v (velocity) when t = 5sec F. Find x (displacement) when t = 5sec

The 8-kg block is moving with an initial speed of 5 m/s. If the coefficient of kinetic friction between the block and plane is μk​=0.25, determine the compression in the spring when the block momentarily stops.

If the coefficient of kinetic friction between the150-lb crate and the ground is uk = 0.2, %3D determine the speed of the crate when t = 4 s. The crate starts from rest and is towed by %3D the 100-lb force. 100 lb 30°

The 100 kg crate is subjected to forces F1= 800 N and F2= 1500 kN, as shown. If it is originally at rest, determine the distance it slides in order to attain a speed of v= 6 m/s. The coefficient of kinetic friction between the crate and the surface is Muk= 0.2

The 5-lb packages ride on the surface of the conveyor belt as shown in (Figure 1). The coefficient of static friction between the belt and a package is 0.45. Figure 0. 6 in. 6 If the belt starts from rest and its speed increases to 2 ft/s in 2 s, determine the maximum angle so that none of the packages slip on the inclined surface AB of the belt. Express your answer in degrees to three significant figures. 0 = Submit Part B Avec b = Request Answer At what angle do the packages first begin to slip off the surface of the belt after the belt is moving at its constant speed of 2 ft/s? Neglect the size of the packages. Express your answer in degrees to three significant figures. IVE| ΑΣΦ | 41 ? vec ? O

The slotted arm OA rotates about a fixed axis through O. At the instant under consideration, 0 = 34°, 0 = 43 deg/s, and 0 = 28 deg/s². Determine the magnited of the force F applied by arm OA and the magnitude of the force N applied by the sides of the slot to the 0.6-kg slider B. Neglect all friction, and let L = 0.75 m. The motion occurs in a vertical plane. Part 1 -L B Answer: ay = i m Slider B moves only vertically (the y-direction). Find the acceleration (positive if up, negative if down). B m y m/s²

Determine the constant force P required to cause the 0.39-kg slider to have a speed v2 = 0.89 m/s at position 2. The slider starts from rest at position 1 and the unstretched length of the spring of modulus k = 210 N/m is 180 mm. Neglect friction.