Question
A stone dropped from the top of a high-rise building is under the action of ____.
- Balanced forces
- Contact forces
- Non-contact forces
- Unbalanced forces
Hint:
Net force is non-zero for unbalanced forces. It causes acceleration.
The correct answer is: Unbalanced forces
- There are 2 forces acting on the stone-
- Gravitational and air resistance.
- Gravitational force acts downwards and pulls the body.
- Air resistance acts on opposite direction of gravitational force.
- As the net force is non-zero, means the forces are unbalanced. Stone accelerates in the direction which has higher force.
- So, the correct option is d.
- Air resistance is a type of contact force.
- Gravitational force is a type of non-contact force.
Related Questions to study
A skydiver is under the action of unbalanced forces when he ____.
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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?
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 skydiver jumps from a helicopter. What are the forces acting on her?
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- An upward net force on a downward falling object would cause that object to slow down.
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- 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 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.
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- The unit of centripetal force is newton.
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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.
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.
When a body is under the action of balanced forces, its ___.
When a body is under the action of balanced forces, its ___.
When the net force on an object is non-zero, the forces on the object are called ___.
An unbalanced force causes a change in motion, speed, direction, or movements because of unequal force or strength that is applied to one side of an object.
When the net force on an object is non-zero, the forces on the object are called ___.
An unbalanced force causes a change in motion, speed, direction, or movements because of unequal force or strength that is applied to one side of an object.