Mechanics | Relativity Answers

A body falls freely from rest.It covers as much distance in the last second of it's motion as covered in the first three seconds.What is the time taken by the body to reach the ground?

A train is moving at a constant speed on a surface inclined upward at 15.0° with the horizontal and travels 300 meters in 5 seconds. Calculate the horizontal velocity of the train at the end of 3 seconds.

tom drives his remote control car from rest, accelerates uniformly in a straight line at 2m/s2 for 10s in a distance of 100m.The car then proceeds at this velocity for 600m and finally comes to rest uniformly in the next 20s.Calculate (a) the maximum velocity of the car during this journey.(b) the total distance travelled by the car.(c)the total time taken by the car to travel the whole trip.(d)the average velocity of the car during the journey.

a car is travelling with uniform acceleration along a straight road. the road has marker posts every 200m. when the car passed one post, it has a speed of 10ms-2 and when it passes the next one, its speed is 20ms-2. what is the car's acceleration?

A carrom board (4' X 4') has the queen at the centre. The queen hit by the striker moves to the front edge rebounds and goes in the hole behind the striking line. The displacement of the queen from the centre to the hole is _________.

2 trains A and B are moving in same direction at same track with B ahead of A with speed u and train A with speed v (v>u). the driver of A sees B and starts decelerating with 'a'. What is the min distance to avoid collision

A SCOOTERIST TRAVELS AT 30 km/h ALONG THE STRAIGHT PATH FOR 20 min. HOW MUCH DISTANCE HAS HE TRAVELLED?

A heavy ball with a mass of 6.0 kg is observed to accelerate at a rate of 4.0 m/s2. What is the size of the net force acting on this ball?

A sound wave, traveling at 355m/s, is emitted
by the foghorn of a tugboat. An echo is heard
3.11 s later.
How far away is the reflecting object?

An object is dropped from a platform 100 feet high. Ignoring wind resistance, what will its speed be when it reaches the ground?

_____ ft/s