Mechanics | Relativity Answers

A uniform sphere of radius 0.5m and mass 15kg rotate with the xy plane about axis through the center.find the angular momentum when the angular velocity is 3rads/ seconds

Some iron has a coefficient of linear expansion 12 x 10^-6K^-1. A 100mm length of iron piping is heated through 20K. The pipe extends by?

The symbol used for volumetric expansion is:

A. gamma B. beta C. L D. alpha

What force is necessary to keep a body of mass 0.8kg moving in a horizontal circle of radius 0.7m with period 0.5s.

a force of magnitude 200 n is directed from a(0 3 0) to b(0 0 4) the z component of force is

A 20 kg wooden crate is dragged 12 m across a rough level floor by a rope. The force of tension in the rope is 50 N at an angle of 25° above the horizontal and the crate is moving at a constant speed of 1.50 m/s.

1. Find the horizontal component of the force of tension in [N].
2. Find the vertical component of the force of tension in [N].
3. Find the magnitude of the weight of the crate in [N].
4. Find the magnitude of the normal force acting on the crate in [N].
5. Find the magnitude of the friction force acting on the crate in [N].
6. Find the work done by the tension force in [J].
7. Find the work done by weight in [J].
8. Find the work done by the normal force in [J].
9. Find the magnitude of the work done by the friction force in [J].
10. What is the total work done on the object in [J]?
11. Find the coefficient of the crate on the floor.

A firefighter stands 50m from a building that caught fire at a particular height. He starts shooting water to remove the blaze. The water moves at a speed of 40m/s and the pipe is inclined or projected at 30 degrees above the horizontal. Calculate the height where the fire caught?