Mechanics | Relativity Answers

A ¼kg clay ball rolling E at 10.7m/s collides with a 7/8kg croquet ball on a smooth(almost) friction less surface with this larger ball rolling 10 degrees N of W at 6.3 m/s. Find the resultant velocity and direction and the distance they travel after becoming stuck together if they continue moving for 3.15s. Assume uniform but unknown acceleration.

If we attach mass(es) to the bottom of the spring (wire), what do you think will happen to the spring (wire)?

A block is being dragged along a horizontal surface by a constant horizontal force of size 45 N. It. covers 8 m in the first 2s and 8.5 in the next 1s. Find the mass of the block.

Thank you in advance!!

you push a 24 kg box horizontally across a warehouse floor with 66 N of applied force. There is 45 N of friction acting on the sled. Determine the acceleration of the sled in metres per second squared. Enter only the number, rounded to two significant digits. *

If kinetic energy of an object is been constant at all times, how does momentum of that object works?.....i think kinetic energy can change to another type of energy such as potential energy(ex:projected ball).that is the way energy is conserved.but here is asking about a motion which kinetic energy is always constant.then how momentum works of that object??i think there is no doubt about linearly motions,because if kinetic energy is constant ,momentum also constant. (mv*v) /2=k ,m is constant .v is also constant. if there`s a direction change in linear motions v should get zero for a moment. it`s mean in there kinetic energy is not constant,that`s why i`m saying there is no doubt about linear motions. because if k is constant then p is also constant.but in angular motions(circle) if kinetic energy is constant ,then linear momentum is not constant. because of the change of direction.but angular momentum can be constant.because we get it using the right hand law.am i right or not?

The planet Earth orbits the sun with a period of one year. In this problem, you may assume the radius of the Earths orbit is 1.50x10^8 km.

(A) Calculate the Earths average speed relative to the sun in meters per second.
(B) what is the earths average velocity relative to the sun over a period of one year in meters per second?

If object 1 has mass of 0.51kg moving to the positive direction at 1 m/s. Object 2 comes to rest and object moves to the negative direction at 0.33 m/s. What is the initial velocity of object 1 in earth reference frame

A 3.250 g bullet enters a wooden block with a velocity of 80.00 m/s. If it exits the block with a velocity of 20.00 m/s, what is the percent of mechanical energy lost to thermal energy due to friction?

An ideal pendulum of length L = 1.2 m supports a mass of m = 0.5 kg. Initially the pendulum is lifted such that it makes an angle of θ = 21 degrees with respect to the vertical.

part(A) When the pendulum is released from rest, what is the maximum speed, vm in m/s, the mass reaches?

At one point in its fall, a ball has a KE of 5J and a PE of 10J. It continues to fall and at another point has
a PE of 3J. What is the ball’s KE at this point?