Mechanics | Relativity Answers

A man moves on his motorbike with 54 km/h and then takes a u-turn and continues to move with same speed. The time of u-turn is 10 sec. Find the average acceleration during u-turn.

An automobile rolls down an incline, traveling s(t) = 3t2 + 7 feet in t seconds.

a) Find its velocity a t = 3. ft/sec

b) Find its acceleration at t = 3. [ft\sec^2]


c) After how many seconds will the velocity be 88 ft/sec? (seconds)

A ball is thrown vertically upwards from the top of a building of height 20m with the speed of 20m/sec. (Take 'g'=10m/sec2).Find-velocity at which the ball hits the ground.
-total time of the journey

find the total displacement of a body in 8 s starting from rest with an acceleration of 20cm/s2

just a simple doubt....... why is the units of gravitation m/s^2 and why not m/s?

About twenty percent of the National Football League weighs more than 300 pounds. At this weight, their Body Mass Index (BMI) places them at Grade 2 obesity, which is one step below morbid obesity. Determine the mass of a 300 pound (1330 N) football player.

A 2000kg car hit a wall with 20ms-¹ initial velocity. After 0.15s hitting time, the car got 1.3ms-¹ velocity backward. The question is what is impulse of the force of the wall on that car?

change in position is called:
1. speed
2. velocity
3. displacement
4. distance

A car starts from rest &Accelerates uniformly at the rate of 1m/s for 5 sec.It then maintains a constant velocity for 30 sec.Then brakes are applied & the car is uniformly retarded to rest in 10 sec.Find the maximum velocity attained by the car & the total distance travelled by it.

A particle traveled with a velocity 5m/s in a time 3s.In the next 10s the velocity of the particle is 5m/s.Then find the average velocity?