Mechanics | Relativity Answers

A bus is moving downhill at a slope of 5 degree on a rainy day. At the moment when the speed of the bus is 30km/h, the driver spots a deer 30m ahead. He applies the brakes and comes to a stop. The deer is paralyzed by fear and does not move. Will the bus stop before reaching it or will it hit the deer? Do relevant calculations and draw appropriate force diagram. Take the coefficient of kinetic friction to be= 0.26 .

a partical travels half of distance of a straight journey with speed 6m/s .the remaining part of the distanc is covered with speed 2m/s for half of the time of remaining journey and with speed 4 m/s for other half of time .the average speed of the partical is ?????????????????????????????????????????

an object travelling in straight line with x=(tsquare-4t+8) m find average speed and average velocity in time interval t=0 to t=5

a partical is moving along a straight line with velocity v=(t-4)m/s and find its average speed in time interval t=0 to t=8

A body of mass m is moving in a horizontal circle of radius r with constant speed v. The force on the body is mv^2/r and is directed towards centre.

Calculate the work done on the object when it moves through a distance which is:

1. 1/2 The circumference of the circle
2. 1/4 the circumference of the circle
3. 3/4 the circumference of the circle
4.complete circumference of the circle.

A 2400 W engine pulls a 200 kg block at constant speed up a 12.0 m long, 25.0° incline.
Determine long does it takes to cover this distance.

The speed of an aeroplane is 1200 ms^-1
1 −
The engines take in 80 kg of air per second and
mix it with 40 kg of fuel. This mixture is expelled after it ignites and it moves at a
velocity of
3000 ,ms^-1 relative to the aeroplane. Calculate the thrust of the engine.

A ball of mass kg, 5.0*10^-2
starting from rest, falls a height of 4.0 m and then collides
with the ground. The ball bounces up to a height of 2.0 m. The collision with the ground
takes place over a time 4*10^-3 s.
Determine (i) the momentum of the ball immediately
before the collision, (ii) the momentum of the ball immediately after the collision and
(iii) the average force of the ground on the ball.

An applied force of 200.0N gives a sled a acceleration of 2.00m/s^2. If you place an additional 60kg mass on the sled, what will the acceleration be?

a 5kg block is pulled acroos a tableby a horizontalforce 40N with frictional force of 8N opposing the motion.calculate the acceleration of thee object..."