Question
Which of the following is not correct?
- The gravitational force of attraction between the two bodies increases when their masses are increased and distance is reduced.
- If we drop a 10Ib iron ball and 1Ib aluminum ball from the top of a high platform inside a mine, then both will reach the floor at the same time.
- We do not observe small objects moving towards each other because frictional force balances the gravitational pull.
- When a body is thrown up, the acceleration due to gravity at the topmost point is zero because the velocity of the body is zero.
The correct answer is: When a body is thrown up, the acceleration due to gravity at the topmost point is zero because the velocity of the body is zero.
The incorrect statement is option(b)
Related Questions to study
A stone is released from the top of a building of height 19.6 m then its final velocity just before touching the ground will be: (taking g = 9.8 m/s2)
A stone is released from the top of a building of height 19.6 m then its final velocity just before touching the ground will be: (taking g = 9.8 m/s2)
A ball is thrown vertically upwards. Which of the following graph/graphs represent the velocity-time graph of the ball during its flight (air resistance is neglected)?
A ball is thrown vertically upwards. Which of the following graph/graphs represent the velocity-time graph of the ball during its flight (air resistance is neglected)?
Acceleration of a particle changes when:
Acceleration of a particle changes when:
When an object is thrown upward during upward motion, it executes ___________ motion.
When an object is thrown upward during upward motion, it executes ___________ motion.
An object is launched upwards and rises to a height of 10 m. Calculate the velocity with which the object was thrown upwards? Take g=9.8 m/s2
An object is launched upwards and rises to a height of 10 m. Calculate the velocity with which the object was thrown upwards? Take g=9.8 m/s2
The weightlessness of a diver jumping from a height is a situation of (when we neglect the air resistance):
The weightlessness of a diver jumping from a height is a situation of (when we neglect the air resistance):
A body of mass of 10 kg is measured using a spring balance which is under freefall then what will be the reading of the spring balance?
A body of mass of 10 kg is measured using a spring balance which is under freefall then what will be the reading of the spring balance?
During freefall the net force acting on a body is:
During freefall the net force acting on a body is:
We have weight because of _____ force.
We have weight because of _____ force.
Read the statements and mark the correct option.
Statement 1: The acceleration due to the gravity of earth does not depend upon the body's mass.
Statement 2: Acceleration due to gravity remains constant.
Read the statements and mark the correct option.
Statement 1: The acceleration due to the gravity of earth does not depend upon the body's mass.
Statement 2: Acceleration due to gravity remains constant.
If the mass of a body on the moon is 50 kg, what is its weight on the earth?
If the mass of a body on the moon is 50 kg, what is its weight on the earth?
What is the mass of a body whose weight is 49 newtons?
The correct option is d)5 kg.
The weight of the body = 49 N
Weight of body = mass of body x gravity
49= mass x 9.8
mass = 49/9.8 = 5 Kg
What is the mass of a body whose weight is 49 newtons?
The correct option is d)5 kg.
The weight of the body = 49 N
Weight of body = mass of body x gravity
49= mass x 9.8
mass = 49/9.8 = 5 Kg
The value of 'g'.
The value of 'g'.
Two objects of different masses falling freely near the surface of the earth would:
The correct option is a)Have same velocities at any instant.
In free fall, velocity depends only on acceleration due to gravity. Acceleration due to gravity is independent of the mass of the object. Therefore, the gravitational pull of the moon applies the same acceleration to both objects. Therefore, it will always have the same velocity regardless of mass. The force depends on the mass, and since the bodies have different masses here, no two will experience the same force.
Two objects of different masses falling freely near the surface of the earth would:
The correct option is a)Have same velocities at any instant.
In free fall, velocity depends only on acceleration due to gravity. Acceleration due to gravity is independent of the mass of the object. Therefore, the gravitational pull of the moon applies the same acceleration to both objects. Therefore, it will always have the same velocity regardless of mass. The force depends on the mass, and since the bodies have different masses here, no two will experience the same force.
