G L Mittal and TARUN MITTAL Solutions for Chapter: Force : Newton's Laws of Motion, Exercise 3: FOR DIFFERENT COMPETITIVE EXAMINATIONS

Author:G L Mittal & TARUN MITTAL

G L Mittal Physics Solutions for Exercise - G L Mittal and TARUN MITTAL Solutions for Chapter: Force : Newton's Laws of Motion, Exercise 3: FOR DIFFERENT COMPETITIVE EXAMINATIONS

Attempt the practice questions on Chapter 9: Force : Newton's Laws of Motion, Exercise 3: FOR DIFFERENT COMPETITIVE EXAMINATIONS with hints and solutions to strengthen your understanding. ISC Physics Class XI Part 1 solutions are prepared by Experienced Embibe Experts.

Questions from G L Mittal and TARUN MITTAL Solutions for Chapter: Force : Newton's Laws of Motion, Exercise 3: FOR DIFFERENT COMPETITIVE EXAMINATIONS with Hints & Solutions

MEDIUM
11th ICSE
IMPORTANT

A boy sitting on the topmost berth in the compartment of a train which is just going to stop on a railway station, drops an apple at the open hand of his brother sitting vertically below his hand at a distance of about 2 meters. The apple will fall:

HARD
11th ICSE
IMPORTANT

Two particles of mass m each are tied at the ends of a light string of length 2a. The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance a from the centre P(as shown in the figure). Now the mid point of the string is pulled vertically upwards with a small but constant force F.  As a result, the particles move towards each other on the surface. The magnitude of acceleration, when the separation between them is 2x is:

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MEDIUM
11th ICSE
IMPORTANT

Two balls, having linear momenta p1=pi^ and p2=-pi^, undergo a collision in free space. There is no external force acting on the balls. Let p1' and p2' be their final momenta. The following option (s) is (are) not allowed for any non-zero value of p, a1, a2, b1, b2, c1 and c2:

HARD
11th ICSE
IMPORTANT

An isolated particle of mass m is moving in a horizontal plane X-Y along the X-axis, at a certain height above the ground. It suddenly explodes into two fragments of masses m4 and 3m4. An instant later, the smaller fragment is at y=+15 cm. The larger fragment at this instant is at:

MEDIUM
11th ICSE
IMPORTANT

A balloon of mass M is descending down with an acceleration awhere a<g. How much mass should be removed from it so that it starts moving up with an acceleration a?

MEDIUM
11th ICSE
IMPORTANT

The force F acting on a particle of mass m is indicated by the force-time graph shown adjoining. The change in momentum of the particle over the time interval from 0 s to 8 s is:

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MEDIUM
11th ICSE
IMPORTANT

A particle moves in the x-y plane under the action of a force F such that the value of its linear momentum P at any time t is px=2 cost, py=2sint. The angle θ between F and P at a given time t will be:

MEDIUM
11th ICSE
IMPORTANT

Two particles of masses m1 and m2 in projectile motion have velocities v1 and v2 respectively at time t=0. They collide at time to. Their velocities become v1' and v2' at time 2to, while still moving in the air. The value of m1v1'+m2v2'-m1v1+m2v2 is: