Mechanics | Relativity Answers

A disc of mass 100 gram slides down from rest on an inclined plane of 30°and comes to rest after travelling a distance of 1m along the horizontal plane.If the coefficient of friction is 0.2 for both inclined and horizontal planes then the work done by the frictional force over the whole journey approximately is (Acceleration due to gravity =10m/s² )
Ans 0.306j

A block of mass 12.0 kg slides from rest down a friction- less 35.0° incline and is stopped by a strong spring with k 5 3.00 3 104 N/m. The block slides 3.00 m from the point of release to the point where it comes to rest against the spring. When the block comes to rest, how far has the spring been compressed?

A 6.50 3 102-kg elevator starts from rest and moves upward for 3.00 s with constant acceleration until it reaches its cruis- ing speed, 1.75 m/s. (a) What is the average power of the elevator motor during this period? (b) How does this amount of power compare with its power during an upward trip with constant speed

If a bulb falls into an iron bucket and it doesn't break
What is the physics behind it

A daredevil on a motorcycle leaves the end of a ramp with a speed of 35.0 m/s .If his speed is 33.0 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.

Two blocks are con-
nected by a light string that
passes over two frictionless
pulleys.
The block of mass m 2 is
attached to a spring of force m1 constant k and m1 . m2.
If the system is released from rest, and the spring is initially not stretched or compressed, find an expression for the maximum dis- placement d of m2.

a pebble is released from a height of 5m. identify the major types of energies the pebble possesses when it reaches a heightof 0.5m from the ground

A steel ballA of mass 20 kg moving with a speed of 2m/s collide with another ball B of mass 10 kg which is initially at rest. After collision, a move with a speed of 1m/s at an angle of 30° with its original direction of motion. Determine the final velocity

Two hockey players push off from a clinch, recoiling from rest. Jean-Claude has an inertia that is 60% greater than Pierre's inertia. After they push off and move across the ice in opposite directions, they lose kinetic energy at the same rate until they come to a stop.

1.What is the ratio of the distances which players traveled?

An elastic collision takes place between a 0.090-kg
toy car moving at 10 ×10^2 m/h and a 0.014-kg toy car moving at 20 *10^9 mm/yr

Part A
What is the kinetic energy of the system?