Classical Mechanics Answers

a ball of 0.25kg is coming with 20m/s velocity collide with bat for 1s how many newton force is apply for stop the ball

A 3.00 kg rock is dropped from the top of a 12.0 m high cliff. Using the conservation of energy, find the following. 

d. The gravitational potential energy after it has fallen 6.00 m. 

e. The kinetic energy after it has fallen 6.00 m. 

f. The gravitational potential energy just as it hits the ground. 

A constant force of 245 N is applied at a 48.2° angle to a mass of 62.1 kg as shown below. If the mass moves at a constant speed of 3.28 ms–1, determine its coefficient of dynamic friction.  

Ans:0.206

What is the speed of a car that went 32 miles in 0.50h?

The spring has a spring constant of 1000 N/m. It is compressed 15 cm, then launches a 200 g block. The horizontal surface is frictionless, but the block's coefficient of kinetic friction on the incline is 0.20. What distance d does the block sail through the air?

A bullet is fired in a horizontal direction with a muzzle velocity of 300m/s. In absence of air resistance, how far will it have dropped in traveling horizontal distance of 20m

A particle travels so that its acceleration is given by a with rightwards harpoon with barb upwards on top equals 2 e to the power of negative 2 t end exponent space i with hat on top minus 3 cos t space j with hat on top space plus sin 2 t space k with hat on top

A constant force of 245 N is applied at a 48.2° angle to a mass of 62.1 kg as shown below. If the mass moves at a constant speed of 3.28 ms–1, determine its coefficient of dynamic friction.  

A rock is thrown from the top of a 36 m high cliff with an initial speed of 12 ms–1 at an angle of 52° to the horizon. How long will it take the rock to reach the bottom of the cliff?

a 73 kg person expends 400 W when walking on a level treadmill at a speed of 7.2 km/h. When the treadmill is inclined without changing the speed, the person's expended power increases to 600 W. What is the angle of incline of the treadmill by assuming that all the increased output goes into overcoming the force of gravity.