Chapter 13, Problem 38P

The spring in the toy gun has an unstretched length of 95 mm. It is compressed and locked in the position shown. When the trigger is pulled, the spring unstretched 10.5 mm, and the 23-gg ball moves along the barrel. Determine the speed of the ball when it leaves the gun. Neglect friction.

The baggage truck A shown in the photo below has a weight of 900 lb and tows a 550-lb cart B and 325lb cart C. For a short time the driving frictional force developed at the wheels of the truck is 40t lb,where t is in seconds. If the truck starts from rest, determine its speed in 2 seconds. Also, what is thehorizontal force acting on the coupling between the truck and the cart B at this instant?

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.

The 190-kg lunar lander is descending onto the moon's surface with a velocity of 6.0 m/s when its retro-engine is fired. If the engine produces a thrust T for 3.8 s which varies with the time as shown and then cuts off, calculate the velocity of the lander when t 4.7s assuming that it has not yet landed. Gravitational acceleration at the moon's surface is 1.62 m/s?. The velocity is positive if moving downward, negative if up. 6.0 m/s T.N 756 1.9 3.8 Answe: v m/s

The two 0.2kg sliders A and B move without friction aound the horizontal circular slot. The sliders are connected by an inextensible cable AB. The system starts from rest in the position shown in the figure. Determine the a. Angle between the tangential acceleration of A, B and the cable AB at this instance. b. Normal force of the cicular slot on slider A and B at this instance c. Tension at cable AB at this instance

The slotted arm OA rotates about a fixed axis through O. At the instant under consideration, 0 = 35%, 0 = 39 deg/s, and Ö = 15 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 0.2- kg slider B. Neglect all friction, and let L = 0.68 m. The motion occurs in a vertical plane. 0 -L B m

During a brake test, the rear-engine car is stopped from an initial speed of 98 km/h in a distance of s = 54 m. If it is known that all four wheels contribute equally to the braking force, determine the braking force F at each wheel in N. Assume a constant deceleration for the 1,446-kg car. Use g = 9.81 m/s?

The 180-g slider has a speed v= 1.4 m/s as it passes point A of the smooth guide, which lies in a horizontal plane. Determine the magnitude R of the force which the guide exerts on the slider (a) just before it passes point A of the guide and (b) as it passes point B. Answers: (a) R₂ = (b) RB = i i -200 mm B N N

The 5.27 kg collar B rests on the frictionless arm AA! The collar is held in place by the rope attached to drum D and rotates about O in a horizontal plane. The linear velocity of the collar B is increasing according to v = 0.2 t2 where v is in m/s and tis in seconds. Find the tension in the rope and the force of the bar on .the collar if 5 s,r= 0.558 m and 0 = 58° A A' D