NEET 2021 Physics Relative Motion and Free Fall MCQ Question
A car starts from rest and accelerates at 5 m/s². At t = 4 s, a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at t = 6 s? (Take g = 10 m/s²)
20 m/s, 5 m/s²
20 m/s, 0
20√2 m/s, 0
20√2 m/s, 10 m/s²
Correct Answer
Detailed Explanation
The velocity of the ball is the same as the car's velocity at t = 4 s, which is 20 m/s. After being dropped, it accelerates under gravity, so at t = 6 s, its velocity is 20√2 m/s and acceleration is 10 m/s².
Found an issue with this question?
Related Questions
More from 2021
Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures:
A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented nuclei is 7.6 MeV whi...
Which of the following statements is not correct?