Question

Name the type of motion when a girl is skipping a rope and moving forward.

Answer 1

Hint: For the sake of simplicity, consider that the girl is skipping the rope with a uniform velocity and moving forward. Visualize the motion that the girl is having if she is skipping the rope with a uniform velocity and coming forward.

Complete step by step answer:
The girl is skipping the rope and coming forward with a uniform velocity.
The path of motion of the girl while skipping the rope is as shown in the following diagram:
In the above diagram, the path of the girl is shown when jumped. h is the maximum height attained by the girl when jumped and R is the horizontal distance covered by the girl when she comes forward with one skip of rope.
The motion of the girl skipping rope shown in the above diagram resembles the projectile motion of an object.
When the girl skips the rope next time, then also the girl undergoes projectile motion for the same horizontal range and vertical height but for the different route.
The girl is skipping the rope over an equal interval of time as we have assumed the velocity is uniform.

Hence, the girl skipping rope and coming forward is in projectile motion.

Note:
One may think that the velocity of the girl is uniform, so the girl is only in the periodic motion. But the projectile motion is also a periodic motion. Also the girl is repeating the motion of skipping the rope again and again over an equal interval of time. Hence, the girl is in projectile and periodic motion.