Advertisements
Advertisements
Question
Choose one or more correct alternatives.
Which of the forces involved in dragging a heavy object on a smooth, horizontal surface, have the same magnitude?
- The horizontal applied force
- gravitational force
- reaction force in vertical direction
- force of friction
Advertisements
Solution
The gravitational force and the reaction force in the vertical direction have the same magnitude. Friction is not action as the horizontal surface is smooth.
APPEARS IN
RELATED QUESTIONS
What do you mean by free fall?
What do you mean by acceleration due to gravity?
What is the acceleration of free fall?
When an object is dropped from a height, it accelerates and falls down. Name the force which accelerates the object.
What force is responsible for the earth revolving round the sun ?
Why does a sharp knife cut objects more effectively than a blunt knife ?
Explain why, the tip of a sewing needle is sharp.
A metal ball of mass 5 kg falls from a height of 490 m. How much time it will take to reach the ground? (g = 9.8 m/s2)
What would be the value of ‘g’ on the surface of the earth if its mass was twice and its radius half of what it is now?
The total energy of an object falling freely towards the ground ______.
A force causes an acceleration of 10 m s-2 in a body of mass 500 g. What acceleration will be caused by the same force in a body of mass 5 kg?
What force, in newton, your muscles need to apply to hold a mass of 5 kg in your hand? State the assumption.
What is escape velocity?
State whether the below statement is True or False.
Neglecting air resistance, a body falling freely near the earth's surface has a constant acceleration.
The free fall of an object is possible only in ______.
Right or wrong sentence:
The value of gravitational acceleration at the centre of earth is zero.
Write scientific reasons.
The value of gravitational acceleration (g) decreases as we go deep inside the earth.
The mass of planet ‘X’ is four times that of the earth, and its radius is double the radius of the earth. The escape velocity of a body from the earth is 11.2 × 103 m/s. Find the escape velocity of a body from the planet ‘X’.
When is free fall possible?
