Overview

A mass of 1 kg is suspended by a thread. It is lifted up with an acceleration of 4.9 ms^–2, and then lowered with an acceleration of 4.9 ms^–2 . The ratio of tensions in first case to second cases is (g = 9.8 ms^–2 )

Ball released from height 10 m strikes ground and rebounds height 5 m. Find impulse imparted by ground while collision, given mass of ball is 100 g. (Take g = 10 m/s²)

A ball is projected from ground with initial momentum p at an angle q. What is the magnitude of net change in linear momentum when it reaches at maximum height of journey?

When an elevator is moving downward with a increasing speed, the apparent weight of a body inside elevator

An insect of mass m = 2 g is inside a vertical drum of radius 1 m that is rotating with an angular velocity of 10 rad/s. If the insect does not fall off then the minimum coefficient of friction is

In case of horse pulling a cart, the force that causes the horse to move forward is the force that

Two balls each of mass 1 kg moving in opposite directions with speed 15 m/s collides and rebounds with the same speed. The magnitude of impulse imparted to each ball due to other is

The kinetic energy of a body varies directly as square of time elapsed. The force acting varies directly as

The ratio of tensions $T_A:T_B$ in two strings $A$ and $B$ supporting a log of mass $M$ as shown in figure is

A $120kg$ dolphin decelerates from $15m/s$ to $7.5m/s$ in $5s$ to join another dolphin in play. What average force was exerted to slow the first dolphin if it was moving horizontally? (Assume that gravitational force is balanced by the buoyant force of the water)