Determine the velocities of blocks A and B 2 s after they are released from rest. Neglect the mass of the pulleys and cables.

vA = 64.4 ft/s 8, VB = 64.4 ft/s 9

vA = 21.5 ft/s 8, VB = 21.5 ft/s 9

vA = 64.4 ft/s 8, VB = 32.2 ft/s 9

vA = 21.5 ft/s 8, VB = 10.73 ft/s 9

Determine the velocities of blocks A and B 2 s after they are release

1.	Determine the velocities of blocks A and B 2 s after they are released from rest. Neglect the mass of the pulleys and cables.
A.	vA = 21.5 ft/s 8, VB = 21.5 ft/s 9
B.	vA = 64.4 ft/s 8, VB = 64.4 ft/s 9
C.	vA = 64.4 ft/s 8, VB = 32.2 ft/s 9
D.	vA = 21.5 ft/s 8, VB = 10.73 ft/s 9
Answer» B. vA = 64.4 ft/s 8, VB = 64.4 ft/s 9

Discussion

No Comment Found

Related MCQs

A boy, having a weight of 90 lb, jumps off a wagon with a relative velocity of vb/w = 6 ft/s. If the angle of jump is 30¬∞, determine the horizontal velocity (vw)2 of the wagon just after the jump. Originally both the wagon and the boy are at rest. Also, compute the total average impulsive force that all four wheels of the wagon exert on the ground of the boy jumps off in t = 0.8s. The wagon has a weight of 20 lb.
A 30-lb block is initially moving along a smooth horizontal surface with a speed of v1 = 6 ft/s to the left. If it is acted upon by a force F, which varies in the manner shown, determine the velocity of the block in 15 s. The argument for the cosine is in radians.
A toboggan and rider, having a total mass of 150 kg, enter horizontally tangent to a 90¬∞ circular curve with a velocity VA and the angle of "descent," measured from the horizontal in a vertical x ‚Äî z plane, at which the toboggan exits at B. Neglect friction in the calculation. The radius rB equals 57 m.
Plates A and B each have a mass of 4 kg and are restricted to move along the frictionless guides. If the coefficient of restitution between the plates is e = 0.7, determine (a) the speed of both plates just after collision and (b) the maximum deflection of the spring. Plate A has a velocity of 4 m/s just before striking B. Plate B is originally at rest.
The two blocks A and B each have a mass of 500 g. The blocks are fixed to the horizontal rods and their initial velocity is 2 m/s in the direction shown. If a couple moment of M = 0.8 N ‚Ä¢ m is applied about CD of the frame, determine the speed of the block in 4 s. The mass of the supporting frame is negligible and its free to rotate about CD.
A 0.6-kg brick is thrown into a 25-kg wagon which is initially at rest. If, upon entering, the brick has a velocity of 10 m/s as shown, determine the final velocity of the wagon.
A man wearing ice skates throws an 8-kg block with an initial velocity of 2 m/s, measured relative to himself, in the direction shown. If he is originally at rest and completes the throw in 1.5 s while keeping his legs rigid, determine the horizontal velocity of the man just after releasing the block. What is the average vertical reaction of both his skates on the ice during the throw? The man has a mass of 70 kg. Neglect friction and the motion of his arms.
A hockey puck is traveling to the left with a velocity of v1 = 10 m/s when it is struck by a hockey stick and given a velocity of v2 = 20 m/s as shown. Determine the magnitude of the net impulse exerted by the hockey stick on the puck. The puck has a mass of 0.2 kg.
A stunt driver in car A travels in free flight off the edge of a ramp at C. At the point of maximum height he strikes car B. If the direct collision is perfectly plastic (e = 0), determine the required ramp speed vC at the end of the ramp C, and the approximate distance s where both cars strike the ground. Each car has a mass of 3.5 Mg. Neglect the size of the cars in the calculation.
A rifle has a mass of 2.5 kg. If it is loosely gripped and a 1.5-g bullet is fired from it with a muzzle velocity of 1400 m/s, determine the recoil velocity of the rifle just after firing.

Determine the velocities of blocks A and B 2 s after they are released from rest. Neglect the mass of the pulleys and cables.

Discussion

No Comment Found

Related MCQs

Reply to Comment