Advertisements
Advertisements
Question
The free fall of an object is possible only in _______.
Options
air
vacuum
on the surface of earth
None of these
Solution
The free fall of an object is possible only in vacuum.
APPEARS IN
RELATED QUESTIONS
A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate
- the maximum height to which it rises.
- the total time it takes to return to the surface of the earth.
A stone is thrown vertically upward with an initial velocity of 40 m/s. Taking g = 10 m/s2, find the maximum height reached by the stone. What is the net displacement and the total distance covered by the stone?
Explain what is meant by the equation :
`g= Gxxm/r^2`
where the symbols have their usual meanings.
During a free fall, will heavier objects accelerate more than lighter ones ?
What is the usual value of the acceleration due to gravity of earth ?
Name the force which pulled the apple off Isaac Newton’s tree.
A pressure of 10 Pa acts on an area of 3.0 m2. What is the force acting on the area ? What force will be exerted by the application of same pressure if the area is made one-third ?
A car is moving with a uniform velocity 30 ms-1. It is stopped in 2 s by applying a force of 1500 N through its brakes. Calculate the following values : The retardation produced in car.
Define the term acceleration due to gravity? Write its S.I. unit.
How are g and G realated ?
A body falls freely under gravity from rest and reaches the ground in time t. Write the expression for the height fallen by the body.
In vacuum, all freely falling objects have the same force. Is it true?
Explain why:
Objects fall to the earth.
Free fall of an object does not depend on the mass of the object.
Write scientific reason.
The value of gravitational acceleration (g) decreases as we go deep inside the earth.
Write scientific reason.
The value of gravitational acceleration (g) is taken to be -g when studying the motion of an object thrown upwards in a straight line.
Write a short note.
Free Fall
When is free fall possible?
