Chapter 15, Problem 40P

-0,3 m The crate moves in a smooth vertical slot from A to B as shown, when a constant vertical force F C is applied to the rope. It starts motion from rest, and the attached spring has no deformation at A. If the mass of the crate is 6 kg, and the vertical 0,4 m displacement between A and B (Sg) is 0.20 m, Be determine the required constant vertical force F when the crate reaches B with a velocity of VB = F 3 m/s. The size and mass of the pulley can be k = 100 N/m neglected.

The spring in the toy gun has an undeformed length of 110.1 mm. It compresses and stops at the position shown. When the trigger is pulled, the spring decompresses 8.3 mm, and the 16.4-g ball moves down the barrel. Determine the speed in m/s of the ball as it leaves the gun. Neglect friction. k = 2 kN/m 50 mm D -150 mm B

Block A has a mass of 2 kg and slides into an OPEN-ENDED box B with a velocity of 2 m/s. If the boxB has a mass of 3 kg and rests on top of a plate P that has a mass of 3 kg, determine the distancethe plate moves after it stops sliding on the floor. Also how long in seconds is it after impact before allmotion ceases? The coefficient of kinetic friction between the box and the plate is μk=0.2, andbetween the plate and the floor μ'k=0.2. Also, the coefficient of static friction between the plateand the floor is μ's = 0.5

The 50-kg block at A is mounted on rollers so that it moves along the fixed horizontal rail with negligible friction under the action of the constant 300-N force in the cable.  The block is released from rest at A, with the spring to which it is attached extended an initial amount x1 = 0.233 m.  The spring has a stiffness k = 80 N/m.  Calculate the velocity v of the block as it reaches position B.

. A device called air-track glider has a mass of 150gm is attached to the end of a horizontal air-track by a spring with a force constant 20N/m as shown below. Initially the spring is unstretched and the glider is moving at 3.50m/s to the right. Find the maximum distance d that the glider moves to the right, if the air is turned off, so that there is kinetic friction with coeficient He=0.40 glider

Block A has a mass of 2 kg and slides into an open ended box B with a velocity of 2 m/s. If the boxB has a mass of 3 kg and rests on top of a plate P that has a mass of 3 kg, determine the distancethe plate moves after it stops sliding on the floor. Also, how long is it after impact before allmotion ceases? The coefficient of kinetic friction between the box and the plate is μk=0.2, andbetween the plate and the floor μ'k=0.2. Also, the coefficient of static friction between the plateand the floor is μ's = 0.5

Q4) The 100 kg crate shown is originally at rest on the smooth horizontal surface. If a towing force of 200 N, acting at an angle of 45°, is applied for 10 s, determine the final velocity and the normal force which the surface exerts on the crate during this time interval. 200 N 450

2. The 50 kg crate is subjected to the forces shown. If it is originally at rest, determine the distance it slides in order to attain a speed of v= 10 m/s. The coefficient of kinetic friction between the crate and the surface is 0.3. 300 N 600 N 40° 300

In the position shown, block A is moving to the left at a speed of 9 m/s, and the spring is undeformed. Determine the stiffness of the spring k, in N/m, that would cause the system to stop after A has displaced 0.8 m. The coefficient of kinetic friction between block A and the horizontal surface is 0.25, and the weights on the pulleys are negligible. The mass of block A is 3.0 kg, and the mass of block B is 5.5 kg. k 0000000000 VA A Мек B