A biker is moving on a circular track. What kind of forces are acting on him?

Pick the odd one out.

Calculate the gravitational force acting on the ball in the figure below

The greater the net force opposite to the direction of motion, the ___ the ____ in the direction of motion.

Find the net force on the car. The various forces associated with the car are given below.

The acceleration of a moving body increases. What could be the reason behind it?
A) Increase in the unbalanced forces
B) Decrease in the unbalanced forces
C) Increase in the balanced forces
D) Increase in the net force
E) Decrease in the net force

A car is moving on a road. What are the forces acting opposite to its direction of motion?
A) Frictional force
B) Force exerted by the engines
C) Air resistance
D) Force exerted by the brakes

A stone dropped from the top of a high-rise building is under the action of ____.

• Air resistance is a type of contact force.
• Gravitational force is a type of non-contact force.

A skydiver is under the action of unbalanced forces when he ____.

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What is the downward force acting on a ball dropped from a height?

A skydiver jumps from a helicopter. What are the forces acting on her?

• The net force and the acceleration on the falling skydiver is upward.
• An upward net force on a downward falling object would cause that object to slow down.
• The skydiver thus slows down.
• As the speed decreases, the amount of air resistance also decreases.

A body moving in a straight line under the action of unbalanced forces moves ____.

A biker biking on a circular path is under the action of ___ forces.

• A centripetal force is a force which acts inwards to an object that moves in a circular path.
• This force is also dependent on the object's mass, speed of rotation of the object as well as the distance from the center.
• The unit of centripetal force is newton.
• The centripetal force is always directed perpendicular to the direction of the object's displacement.

A laptop lying on the table is under the action of ___.

The greater the net force in the direction of motion, the ___ the ____ in the direction of motion.

When a body is under the action of unbalanced forces, it _____.

Two or more forces exerted on an object are balanced if their effects cancel each other, and they do not cause a change in the object's motion.