Motion Test - 4...

A and B are thrown vertically upward with velocity, 5 m/s and 10 m/s respectively $$(g = 10\ m/s^{2})$$. Find separation between them after one second.

Figure shows the position of a particle moving on the x-axis as a function time

A bullet loses $$\dfrac{1}{20}$$ of its velocity in passing through a plank. What is the least number of planks required to stop the bullet?

If an object is moving eastward and slowing down, then the direction of its velocity vector is 

A student determined to test the law of gravity for himself walks off a sky scraper 320 m high with a stopwatch in hand and starts his free fall (zero initial velocity). 5 second later, superman arrives at the scene and dives off the roof to save the student. What must be the maximum height of the skyscraper so that even superman cannot save him.

Figure shows the position time graph of a particle moving on the x-axis.

Which of the following four statement is false?

A car falls off a bridge and drops to the ground in $$0.5 s$$. Let $${g=10m/s^2}$$. How high is the bridge from the ground?

Which one of the following is travelling with the fastest speed?

A stone is dropped from a height of 20 m. How long will it take to reach the ground? ($$ {g=10 m/s^2}$$ ).