Advertisements
Advertisements
प्रश्न
Multiple Choice Question. Select the correct option.
A force acts on a body of mass 3 kg such that its velocity changes from 4 ms−1 to 10 ms−1. The change in momentum of the body is
पर्याय
42 kgms−1
2 kgms−1
18 kgms−1
14 kgms−1
Advertisements
उत्तर
18 kgms−1
Explanation:
Mass = m = 3 kg
Velocity v1 = 4 ms−1
Velocity = v2 = 10 ms−1
Change in momentum of body
= mv2 – mv1 = m (v2 – v1) = 3 (10 – 4)
= 3 × 6 =18 kgms−1
APPEARS IN
संबंधित प्रश्न
A body of mass 0.40 kg moving initially with a constant speed of 10 m s–1 to the north is subject to a constant force of 8.0 N directed towards the south for 30 s. Take the instant the force is applied to be t = 0, the position of the body at that time to be x = 0, and predict its position at t = –5 s, 25 s, 100 s.
Explain why a cricketer moves his hands backwards while holding a catch.
A smooth wedge A is fitted in a chamber hanging from a fixed ceiling near the earth's surface. A block B placed at the top of the wedge takes time T to slide down the length of the wedge. If the block is placed at the top of the wedge and the cable supporting the chamber is broken at the same instant, the block will.
A free 238U nucleus kept in a train emits an alpha particle. When the train is stationary, a nucleus decays and a passenger measures that the separation between the alpha particle and the recoiling nucleus becomes x at time t after the decay. If the decay takes place while the train is moving at a uniform velocity v, the distance between the alpha particle and the recoiling nucleus at a time t after the decay, as measured by the passenger, is
Consider the situation shown in the following figure All the surfaces are frictionless and the string and the pulley are light. Find the magnitude of acceleration of the two blocks.
A constant force F = m2g/2 is applied on the block of mass m1 as shown in the following figure. The string and the pulley are light and the surface of the table is smooth. Find the acceleration of m1.
Find the acceleration of the blocks A and B in the three situations shown in the following figure.
Write the mathematical form of Newton's second law of motion. State the conditions if any.
The linear momentum of a body of mass m moving with velocity v is :
The linear momentum of a ball of mass 50 g is 0.5 kg m s-1. Find its velocity.
