Advertisements
Advertisements
Question
Which one of the following forces is a contact force?
Options
Force of gravity
Force of friction
Magnetic force
Electrostatic force
Solution
Force of friction
Explanation -
Force of friction is a contact force. It always acts when the bodies are in contact.
APPEARS IN
RELATED QUESTIONS
One or more forces are acting in the following example. Name them.
An object falling from a tall building: ______
Explain in your own words and give one example.
Gravitational force
Explain in your own words and give one example.
Mechanical force
Explain in your own words and give one example.
The force of friction
Write an answer to the following question in your own words.
What are the things that can be done by applying force?
Solve the following crossword puzzle.
Down:
(1) _______ force is to be applied to push a scooter that has failed.
(2) _________ force can be used to pick up scattered pins.
Across:
(1) A _______ pulls an iron nail towards itself.
(3) ________ force was used when the farm was ploughed with a tractor.
(4) It is due to the force of _________ that raindrops fall to the ground.
List out the types of forces on the basis of contact.
Velocity versus time graph of a ball of mass 50 g rolling on a concrete floor is shown in Fig. 9.1. Calculate the acceleration and frictional force of the floor on the ball.
Where do we apply a force while walking?
Two rods of the same weight and equal length have different thickness. They are held vertically on the surface of sand as shown in figure. Which one of them will sink more? Why?
