Chapter 15, Problem 6P

The sports car has a mass of 4000 Kg, and while it is traveling at 35 m/s the driver causes it to accelerate at 7 m/s². If the drag resistance on the car due to the wind is F, = (1.3v) N, where v is the velocity in m/s, determine the power supplied to the engine at this instant. The engine has a running efficiency of e= 0.60. F,

The 100-kg crate is hoisted by the motor M. If the velocity of the crate increases uniformly from 1.5 m/s to 4.5 m/s in 5 s, determine the tension developed in the cable during the motion.

Please write legibly.

The block has a mass of 50 kg and rests on the surface of the cart having a mass of 75 kg. If the spring which is attached to the cart and not the block is compressed 0.2 m and the system is released from rest, determine the speed of the block with respect to the cart after the springg becomes undeformed. Neglect the mass of the wheels and the spring in the calculation. Also the neglect friction. Take k = 300N/m,

A toy car is propelled by water that squirts from an internal tank at a constant 6 ft/s relative to the car. The weight of the empty car is 0.4 lb and it holds 2 lb of water. Neglecting other tangential forces, determine the top speed of the car.

Water issues from a nozzle with an initial velocity v and supports a thin plate of mass m at a height h above the nozzle exit. A hole in the center of the plate allows some of the water to travel upward to a maximum altitude 2h above the plate. Determine the mass m of the plate. Neglect any effects of water falling onto the plate after reaching maximum altitude. Let p be the density of water. 2h -d -D m

The second stage of a two-stage rocket weighs 2000 lb (empty) and is launched from the first stage with a velocity of 3000 mi/h. The fuel in the second stage weighs 1000 lb. If it is consumed at the rate of 50lb/s and ejected with a relative velocity of 8000 ft/s, determine the acceleration of the second stage just after the engine is fired. What is the rocket’s acceleration just before all the fuel is consumed? Neglect the effect of gravitation.

The box has a mass of 50 kg and is at rest. When it is pulled with 1000 N, what will be the velocity if it moves 5m to the right? Neglect friction.

What’s the correct answer for this please ?