# IIT - JEE Mains Updates

Post a Lesson

All

All

Lessons

Discussion

An electron and a proton are moving under the influence of mutual forces. In calculating the change in... read more

An electron and a proton are moving under the influence of mutual forces. In calculating the change in the kinetic energy of the system during motion, one ignores the magnetic force of one on another. This is, because
(a) the two magnetic forces are equal and opposite, so they produce no net ‘ effect
(b) the magnetic forces do not work on each particle
(c) the magnetic forces do equal and opposite (but non-zero) work on each particle
(d) the magnetic forces are necessarily negligible read less

A body of mass 0.5 kg travels in a straight line with velocity v = ax3/2 where a = 5 m-1/2 s_1. The... read more

A body of mass 0.5 kg travels in a straight line with velocity v = ax3/2 where a = 5 m-1/2 s_1. The work done by the net force during its displacement from x = 0 to; x = 2m is

(a) 5 J
(b) 50 J
(c) 10 J

Which of the diagrams in figure represents varation of total mechanical energy of a pendulum oscillating... read more
Which of the diagrams in figure represents varation of total mechanical energy of a pendulum oscillating in air as functon of time?

A raindrop falling from a height h above ground, attains a near terminal velocity when it has fallen... read more
A raindrop falling from a height h above ground, attains a near terminal velocity when it has fallen through a height (3/4)h. Which of the diagrams shown in figure correctly shows the change in kinetic and potential energy of the drop during its fall up to the ground?

Calculate the work done by a car against gravity in moving along a straight horizontal road. The mass... read more
Calculate the work done by a car against gravity in moving along a straight horizontal road. The mass of the car is 400 kg and the distance moved is 2 m. read less

A body falls towards earth in air. Will its total mechanical energy be conserved during the fall? Justify. read more
A body falls towards earth in air. Will its total mechanical energy be conserved during the fall? Justify. read less

A body is moved along a closed loop. Is the work done in moving the body necessarily zero? If not, state... read more
A body is moved along a closed loop. Is the work done in moving the body necessarily zero? If not, state the condition under which work done over a closed path is always zero. read less

In figure the co-efficient of friction between the floor and the body B is 0.1. The co-efficient of friction... read more
In figure the co-efficient of friction between the floor and the body B is 0.1. The co-efficient of friction between the bodies B and A is 0.2. A force F is applied as shown on B. The mass of A is m/2 and of B is m. Which of the following statements are true?

Mass m, moves on a slope making an angle θ with the horizontal and is attached to mass m2 by a... read more

Mass m, moves on a slope making an angle θ with the horizontal and is attached to mass m2 by a string passing over a frictionless pulley as shown in figure. The coefficient of friction between mu and the sloping surface is µ. Which of the following statements are true?

In figure a body A of mass m slides on a plane inclined at angle θ1 to the horizontal and µ... read more
In figure a body A of mass m slides on a plane inclined at angle θ1 to the horizontal and µ is the coefficient of friction between A and the plane. A is connected by a light string passing over a frictionless pulley to another body 5, also of mass m, sliding on a frictionless plane inclined at an angle θ2 to the horizontal. Which of the following statements are true?

UrbanPro.com helps you to connect with the best in India. Post Your Requirement today and get connected.

Overview

Questions 44

Lessons 26

Total Shares

5 Followers

## Top Contributors

Connect with Expert Tutors & Institutes for IIT - JEE Mains

x