Q. A body is projected upwards with a velocity of from the surface of earth. What will be the velocity of the body when it escapes from the gravitational pull of earth?

MHT CET MHT CET 2006Gravitation Report Error

Solution:

lnitiaI KE of the body
Here,
So,

As energy is used up in coming out from the gravitational pull of the earth, so final KE should be

Hence,

or

Questions from MHT CET 2006

1. There is no change in the volume of a wire due to change in its length on stretching. The Poisson's ratio of the material of the wire is

Gravitation

2. A rectangular block is 5 cm 5 cm 10 cm in size. The block is floating in water with 5 cm side vertical. If it floats with 10 cm side vertical, what change will occure in the level of water?

Mechanical Properties of Fluids

3. A body fahs from a height h = 200 m. The ratio of distance travelled in each 2 s, during t = 0 to t = 6s of the journey is

Motion in a Straight Line

4. An engineer claims to have made an engine delivering 10 kW power with fuel consumption of . The calorific value of fuel is 2 . This claim is

Work, Energy and Power

5. Which of the following generates a plane wavefront ?

Wave Optics

Questions from Gravitation

1. The binding energy of a satellite of mass m in a orbit of radius r is (R = radius of earth, g = acceleration due to gravity)

Maharashtra CET 2005

2. Assertion : Planet is a heavenly body revolving round the sun.
Reason : Star is luminous body made of gaseous material.

AIIMS 2002

3. If , and represent the work done in moving a particle from to along three different paths , and (as shown in fig) in the gravitational field of the point mass . Find the correct relation between , and

Maharashtra CET 2019

4. A projectile is fired from the surface of the Earth of radius with a velocity , where is the escape velocity and . Neglecting the air resistance, the orbital velocity of the projectile is

NTA Abhyas 2020

5. The effect of rotation of the Earth on the value of acceleration due to gravity is

NTA Abhyas 2020

Physics Most Viewed Questions

1. If and respectively denote energy and gravitational constant, then has the dimensions of:

NEET 2021 Physical World, Units and Measurements

2. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

NEET 2020 Dual Nature of Radiation and Matter

3. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

NEET 2021 Motion in a Straight Line

4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

NEET 2020 Electromagnetic Induction

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury

NEET 2020 Mechanical Properties of Fluids