Introduction to Force

Q. What are real life applications of impulsive force?

Q. Define one newton of force.

Q.

Define the term 'Force'.

Q.

Name the S.I. unit of force and define it.

Q. Which of the following has SI unit as $kgm{s}^{-2}$?

1. Force
2. Momentum
3. Acceleration
4. Inertia

Q.

How does the gravitational force change between two objects when the distance between them is doubled ?

Q.

Two massive objects of masses 5 kg and 20 kg are separated by a distance of 25 m, then the distance at which no net gravitational force is felt due to these masses, is

1. 8.33 m from 5 kg object

2. 25 m from 20 kg object

3. 50 m from 20 kg object

4. 5 m from 5 kg object

Q.

What is meant by the point of application of force?

Q.

Define one Newton force.

Q.

When a net force acts on an object, the object will be accelerated in the direction of force with an acceleration proportional to

1. force

2. mass

3. momentum

4. Inertia

Q. Is gravitational force a scalar or vector quantity

Q.

Differentiate between the following.

Effort and load

Q.

What is an external influence which changes or tends to change the state of rest or uniform motion of body called?

1. Density

2. Pressure

3. Momentum

4. Force

Q.

Name the physical quantity which causes motion in a body.

Q.

The simple machine with a grooved wheel and a rope is_______. (a pulley/wheel and axle).

Q.

What is Moment example?

Q. ________ is the push or pull acting upon an object.

1. Inertia
2. Impulse
3. Force
4. Momentum

Q.

Does acceleration depend on the force?

Q.

Name and define the absolute unit of force in M.K.S. system.

Q. In a free body diagram, all the ____________ forces are represented.

1. Internal
2. External
3. Both internal and external
4. None of above

Q.

One way that you can recognize that a force is acting on an object:

1. A and C

2. is to measure the instantaneous velocity of a moving object.

3. is to determine its mass at different locations.

4. is to note any change in the objects state of motion.

Q.

Define $1dyne$ of force, and give its relation with newton.

Q. A force cannot change ________ of a body.

1. speed
2. mass
3. direction of motion
4. shape

Q. What is gravitation?

Q. In the above figure, the arrows indicate the direction of forces $F_1$ and $F_2$ and the magnitudes of the respective force are given above the arrows. Initially the block is at rest. Towards which direction will the block move?

1. The block will move towards the direction of force $F_2$.
2. The direction of motion cannot be determined.
3. The block will not move as the forces are balanced.
4. The block will move towards the direction of $F_1$ force.

Q.

What is the magnitude of the gravitational force exerted by a 15Kg mass on a 25Kg mass separated by a distance of 25cm? What is the acceleration produced in each mass?

Q. Free body diagrams are diagrams used to show the ________________________and ____________________________of all forces acting on an object of a given system.

1. direction, magnitude
2. velocity, acceleration
3. position, speed
4. acceleration, position

Q.

Is it true that two bodies exert forces on each other only when they are in contact?

Q.

In the case of a moving body, force is not needed

1. to increase the speed of the body

2. to decrease the momentum of the body

3. to change the direction of motion

4. to keep the body in uniform velocity

Q.

What is force? What can a force cause?