Question

change the direction of an object what kind of force is required (a) force of inertia ( b)friction force ( c) unbalanced force (d) gravitional force ​

Answer 1

Answer

(c) unbalanced force

Explanation:

Ans. Explaination - (a) force of inertia- it is used to change the state of motion not direction. e.g- you are sitting in a bus (at rest) and suddenly bus accelerates then u feel backward force is force of inertia.

(b) friction force- this force is a type of retarding force as it always opposes direction of motion and brings body at rest. e.g- when you stop pedalling bicycle, after some time you stops.

(c) unbalanced force- in this force the motion is always in the direction of greater force.e.g- in football, a footballer applies a greater(more than that of ball) in any direction in which he wants the ball to move.

(d) gravitational force- this force acts always towards centre of earth, so the motion is always towards earth.

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Answer 2

c) Unbalanced force is used to change the direction of an object.

Explanation:

• An unbalanced force acting on a still object could make the object start moving.
• An unbalanced force acting on a moving object could make the object change direction, change speed, or stop moving.
• An unbalanced force causes the object on which it is acting to accelerate, changing its position, speed, or direction due to equal forces on opposite sides.
• The force of inertia is the property common to all bodies that remain in their state, either at rest or in motion, unless some external cause is introduced to make them alter this state.
• The frictional force is the opposing force that is created between two surfaces that try to move in the same direction or that try to move in opposite directions.
• The gravitational force is a force that attracts any object with mass.