Laws of Motion ...

Two bodies of equal masses revolve in circular orbits of radii R₁ and R₂ with the same period Their centripetal forces are in the ratio.

Two masses M and M/2 are joined together by means of light inextensible string passed over a frictionless pulley as shown in fig. When the bigger mass is released, the small one will ascend with an acceleration

A 0.5 kg ball moving with a speed of 12 ms^–1 strikes a hard wall at an angle of 30^o with the wall. It is reflected with the same speed and at the same angle. If the ball is in contact with the wall for 0.025 S the average force acting on the wall is

A shell of mass 200g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 KJ of energy. The initial velocity of the shell is

A gramophone record is revolving with an anguler velocity ω. A coin is placed at a distance r from the centre of the record. The coefficient of static friction is . The coin will revolve with the record if

A stone of mass 2 k g is tied to a string of length 0.5 m It the breaking tension of the string is 900N, then the maximum angular velocity the stone can have in uniform circular motion is

A sparrow flying in air sits on a stretched telegraph wire. If the weight of the sparrow is W ,which of the following is true about the tension T produced in the wire?

Fig. shows the displacement of a particle going along X-axis as a function of time. The force acting on the particle is zero in the region

A Force (F) varies with time (t) as shown in fig. Average force over a complete cycle is-