A car weighing 40 tons is switched to a 20% upgrade with a velocity of 30 mph. If the car is
then allowed to run black, what velocity will it have at the foot of the grade?
A 200 ton train is accelerated from rest to a velocity of 30 miles per hour on a level track. How
much useful work was done?
A drop hammer weighing 40 Kn is dropped freely and drives a concrete pile 150 mm into the
ground. The velocity of the drop hammer at impact is 6 m/sec. What is the average resistance of the soil in Kn?
A car weighing 12 Kn including its cargo in moving down a
30˚ slope. The driver sees an
obstruction way ahead, so he applies the brakes at the instant that his speed is 20 m/s. What constant force
parallel to the road must be provided by the brakes so that the car should stop in a distance of 100 m.
A 1 N bullet is fired with a velocity of 900 m/sec. into an 89 N sand box mounted on wheels.
After the impact, the box strikes a spring and is brought to rest in a distance of 150 mm. Find the spring
A 3000 N block slides down an incline having a slope of 3 vertical to 4 horizontal. It starts from
rest and after moving 1.2 m strikes a spring whose modulus is 1500 N/m. If the coefficient of kinetic friction is
0.20, Find the maximum velocity of the block?
A block weighing 500 N is dropped from a height of 1.2 m. upon a spring whose modulus is 20
N/mm. What velocity will the block have at the instant the spring is deformed 100 mm?
A 50 kg object strikes the unstretched spring attached to a vertical wall having a spring
constant of 20 KN/m. Find the maximum deflection of the spring. The velocity of the object before it strikes the
spring is 40 m/s.
A large coil spring with a spring constant k = 120 N/m is elongate , within its elastic range by 1
m. Compute the stored energy of the spring in N.m.