An automobile engine develops 30 hp in moving the automobile at a constant speed of 50 `miles//hr` What is the average retarding force due to such things as wind resistance, internal friction, tire friction, etc. ?

An automobiles engine develops a power of 100 kilowatt, when rotating at a speed of 30 rev/sec. What torque does it deliver?

An automobile engine propels a 1000 kg car (A) along a levelled road at a speed of 36 km//h. Find the power if the opposing frictional force is 100 N Now, suppose after travelling a distance of 200 m, this car collides with another stationary car (B) of same mass and comes to rest. Let its engine also stop at the same time. Now car (B) starts moving on the same level road without getting its engine started. Find the speed of the car (B) just after the collision.

An automobile engine propels a 1000 kg car (A) along a levelled road at a spedd of 36 km//h. Find the power if the opposing frictional force is 100 Now, suppose after travelling a distance of 200 m, this car collides with another stationary car (B) of same mass and comes to rest. Let its engine also stop at the same time. Now car (B) starts moving on the same level road without getting its engine started. Find the speed of the car (B) just after the collision.

An automobile approaches a barrier at a speed of 20 m/s along a level road. The driver locks the brakes at a distance of 50 m from the barrier. What minimum coefficient of kinetic friction is required to stop the automobile before it hits the barrier ?

An army vehicle of mass 1000 kg is moving with a velocity of 10 m//s and is acted upon by a forward force of 1000 N due to the engine and a retarding force of 500 N due to friction. What will be its velocity after 10 s

An elevator of total mass 1800 kg is moving up with a constant speed of 2m/s . A frictional force of 4000 N acts on this motion. What is the power exerted by gravitational force ?

A 5 kg box is moving straight across the floor at a constant speed by a force of 30 N as shown in figure a. How large a friction force impends the motion of the box ? b. Find mu_(k) between the box and the floor

A 5 kg box is moving staright across the floor at a constant speed by a force of 30 N as shown in figure a. How large a friction force impends the motion of the box ? b. Find mu_(k) between the box and the floor

An automobile driver travels from a plain to a hil station 120 km away at an average speed of 30 km per hour. He then makes the return trip at an average speed 25 km per hour. He covers another 120 km on the plain at an average speed of 50 km per hour. His average speed (in km/hr) over the entire distance of 360 km will be