Question

What is not true of unbalanced forces? 1.It can change the velocity of the object 2.It can change the direction 3.Change the momentum 4.Change the shape of the body

Answer 1

The correct option is 3.can't change the momentum

Explanation:

• When a force is unbalanced, then an object will move and also be able to change its direction. The shape of the body of the object may also change depending on the force.
• The momentum can also change. Hence, the option can't change the momentum is not true of unbalanced forces.

Answer 2

3. Change in momentum is not true for unbalanced forces.

Explanation:

Unbalanced Force

• When the force of direction is applied only in one direction, the net force is non-zero.
• Or when the forces acting on each side is not equal, then the net resultant force decides the direction of motion.
• There is acceleration in the system as a result of non zero resultant force.
• The velocity of object changes when unbalanced force is applied because of acceleration.
• There can be change in direction of motion because velocity has magnitude and direction and acceleration can be change any of them.
• There can be change in shape of the body as a result of force applied.
• There is no change in  momentum of the body. Change of momentum requires impulse.
• Example: When the truck is pushed in the same direction by many people, the net force acting on the system is the addition of all the individual forces. This unbalanced force causes the truck to move.