science
Grade-7
Easy
Question
Which of the following actions can be done by applying force?
a) Squeezing the toothpaste out of the tube
b) Dragging a heavy load
c) Swirling a stone tied to a string around
d) Lifting heavy luggage
e) Opening and closing a door
- All are correct except c
- Only a, b and d are correct
- Only b, d and e are correct
- None is incorrect
Hint:
- A force is an influence that can change the motion of an object.
- A force can cause an object with mass to change its velocity, i.e., to accelerate.
- Force can also be described intuitively as a push or a pull.
- A force has both magnitude and direction, making it a vector quantity
The correct answer is: None is incorrect
- First, what is force? Force is an external agent with mass that can change an objects state of motion and direction.
- Push and pull is a type of force.
- For doing all the above mentioned things we need to use certain amount of force.
- May it be opening a door or dragging heavy object.
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