Mechanics | Relativity Answers

The distance between two bodies is r , if the mass of one is doubled , so the distance between them has to be X*r to make attraction force between them decreases to its half.

A uniform metre rule of weight 1.0N, is pivoted at the 0.40m mark. A 2.0N weight is hung from the 0.15m mark. Where must a 2.0N weight be placed to balance the rule

two collinear harmonic oscillations x1=8sin (100πt)and y1=12sin (96πt) are superposed. calculate the (i) maximum and minimum amplitudes, and (ii) the frequency of amplitude modulation.

A simple pendulum has a period of 4.2 secs. When the length of the pendulum is shortened by 1 meter, the period is 3.7 sec. Calculate the original length. The value of acceleration due to gravity.

A ball is thrown with a speed of 100m/s attains a height of 150m. calculate the time of flight.

when coordinates of an object remain fixed despite the time , the object is said to be

Discussion on the elastic properties of a spring

A dog (mass 11.7 kg) sits on a sled (mass 5.1 kg) that is being pushed with a force of 35 N on a flat snowy surface. If the acceleration of both is 1.7 m/s2, what is the coefficient of kinetic friction for the sled sliding on the snow?

A rocket, with a mass of 1800 kg, accelerates upwards at 85.0 m/s/s. Unfortunately, it explodes 2.5 s after take off into two different size pieces. One piece is two times as massive as the other piece. Radar evidence showed the smaller piece traveled at an angle of 10.0o from the original trajectory of the rocket, in a westerly direction, to a height of 9000 m. The larger piece was not recorded and saved by radar as a result of a malfunction.
a). Determine the speed and direction of the larger, two times as massive, piece?
b). How far, and in what direction from the launch site, should the search time look to find the larger piece?

A body of mass 2500g is projected up an inclined plane with initial velocity 300cm3^-1. The plane is inclined at an angle 15° to the horizontal, and the coefficient of friction between the plane and the body is 0.25. determine how far up the plane it will go before coming to rest.