Question
A skydiver jumps from a helicopter. What are the forces acting on her?
- Only gravitational force
- Only air resistance
- Gravitational force and air resistance
- Centripetal force
Hint:
There are 2 forces acting on a skydiver.
The correct answer is: Gravitational force and air resistance
- There are 2 forces acting on her. Gravitational force which pulls down and air resistance which acts on opposite direction of the motion.
- So, the correct option is c.
- 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.
Related Questions to study
A body moving in a straight line under the action of unbalanced forces moves ____.
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 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 ___.
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.
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.