Force
Trending Questions
A car weighing 1000 kg and travelling at 30 m/s stops at a distance of 50 m decelerating uniformly. What is the force exerted on it by the brakes?
- 9500 N
- 1800 N
- 4500 N
- 9000 N
Force has both magnitude and direction.
Magnitude
Direction
- metre
- newton
- dyne
- pascal
A force is applied to a ball when it is:
- Thrown
- All of the above.
- Kicked
- Pushed
When a force is applied on a body, the shape of the body can change.
False
True
Statement 1: Force acting on a body increases its kinetic energy from 200 J to 400 J. Here, this force does positive work on the body.
Statement 2: A force does positive work on an object when the displacement is in the direction of the force itself.
Both the statements are true and statement 2 is the correct explanation of statement 1.
Both the statements are true and statement 2 is not the correct explanation of statement 1.
Statement 1 is true but statement 2 is false.
Statement 1 is false but statement 2 is true.
- Change in shape of the body.
- Change in size of the body.
- Change in state of motion.
- Change in direction of motion.
- dyne
- N
- kgf
- gf
Which of the following statements is/are true?
1. Forces in the same direction add up.
2. Two forces in opposite directions resulting in net force, equal to their difference, in the direction of the larger force.
3. Change in either direction or magnitude of a force changes its effect.
4. When more than one force is acting on an object, the effect on the object is due to the net force acting on it.
1 and 3 only
2 and 3 only
2, 3 and 4 only
All of the above
Observation 1: Try to stop a ball coming towards you, so as to save a boundary, by applying a force of some magnitude in the opposite direction of the motion of the ball.
Observation 2: In this case apply the force of the same magnitude but in the same direction of the motion of the ball.
In observation 1, the boy saves a boundary by applying a force opposite to the direction of motion, but in observation 2, the change in direction of force cost the team 4 runs as the change in direction of force pushed the ball further to the boundary.
So, the change in the effect of a force can be experienced by a change in its direction as well as magnitude. The above statement is:-
True
False
- 98 N
- 980 N
- 9.8 N
- 0.98 N
Person A is applying 10 N force towards right while person B is applying 20 N force towards left. In which direction will the box start to move?
- Right
- Downward
- Left
- Upward
- 10 N
- 5 N
- 0 N
- 15 N
- Pressing the brakes of a bicycle.
- Filling up the bicycle tube with air
- Riding bicycle against the flow of wind
- Playing with the kite
- gf
- dyne
- kgf
- N
- Pushed
- Kicked
- All of the above
- Thrown
- newton
- pascal
- metre
- dyne
- N
- Pascal
- Newton
- F
- 15 N towards left
- 5 N towards right
- 15 N towards right
- 5 N towards left
- 0 N
- 10 N
- 5 N
- 15 N
Which of the following statements is/are true?
Forces in same direction will be added.
Two forces in opposite direction result in a net force equal to their difference in the direction of larger force.
Change in either direction or magnitude of force changes its effect.
When more than one force is acting on it, the effect on the object is due to the net force acting on it.
- gf
- dyne
- N
- kgf
- N
- kgf
- gf
- dyne
- All of the above
- Thrown
- Kicked
- Pushed
- The object changes direction of motion.
- The object slows down.
- All of the above
- The object speeds up.
- Pushed
- Thrown
- All of the above
- Kicked
To completely describe force acting on a body, we need to:
Specify its magnitude only.
Specify its direction only.
Specify both its direction and magnitude.
Depends on the type of force.
- 980
- 9.8×10−3
- 9.8
- 9.8×10−5
- dyne
- N
- kgf
- gf