# Acceleration

## Trending Questions

**Q.**

A bus decreases its speed from $80km{h}^{-1}$ to $60km{h}^{-1}$ in $5s$, find the acceleration of the bus.

**Q.**Define uniform and non-uniform motion.

**Q.**

The area under the velocity-time graph gives:

Distance

Velocity

Acceleration

Displacement

**Q.**

State which of the following situations are possible and give an example for each of these: (a) an object with a constant acceleration but with zero velocity. (b) an object moving in a certain direction with acceleration in the perpendicular direction.

**Q.**

What are the effects of force on an object?

**Q.**

A car travels from stop A to stop B with a speed of 30 km/h and then returns back to A with a speed of 50 km/h. Find :

(a) displacement of the car

(b) The average speed of the carA

(c) Total distance traveled

**Q.**

A body thrown vertically upward reaches a maximum height H. It then return to ground. Calculate the distance travelled and displacement.

**Q.**Can a body moving with a constant speed have acceleration?

**Q.**

If a bus travelling at 20 m/s is subjected to a steady deceleration of 5 m/s2, how long will it take to come to rest?

**Q.**

An aircraft travelling at 600 kmh accelerates steadily at 10 km/h per second. Taking the speed of sound as 1100 km/h at the aircraft's altitude, how long will it take to reach the 'sound barrier'?

**Q.**

(a) Write the formula for acceleration. Give the meaning of each symbol which occurs in it.

(b) A train starting from railwaystation attains a speed of 21 ms in one minute. Find its acceleration.

**Q.**

A driver decreases the speed of car from 25m/sec to 10 m/sec in 5 seconds. Find the acceleration

**Q.**

Derive the first equation of motion.

**Q.**

A body dropped from a tower covers 25m in the last second of its fall. Then, the height of tower is [ take g= 10 m/s^2]

(1) 45m (2) 20m (3) 40m (4) 50m

**Q.**

A bus accelerates uniformly from $54km/hr$ to $72km/hr$ in $10s$. Calculate the distance covered by the bus in metres during interval and also find the acceleration in metre per second square.

**Q.**

Define speed. Explain different types of speed with examples.

**Q.**

What are the different types of acceleration?

**Q.**

If a body moves with uniform velocity. Why it's acceleration is0?

**Q.**

derive the equation for uniform accelerated motion for the displacement covered in its Nth second.(s_{n}=u+a(n-1\2)

**Q.**Define acceleration.

**Q.**

What is the fourth equation of motion?

**Q.**

The gravitational unit of force is________?

**Q.**A bus starts from test and attains 40 km h

^{1 }velocity after 10 sec calculate the acceleration of the bus in km h

^{2 }and in m s

^{2}

**Q.**

When the distance travelled by a body is directly proportional to the square of the time taken, the motion of the body is(give correct reason to support this answer ) and also why other options are not correct except correct one

A.uniform

B.uniformly accelerated

C.zig zag

D.circular

**Q.**

What do you mean by negative and positive acceleration ? Explain.

**Q.**

What is the acceleration of a body moving with uniform velocity?

**Q.**A balloon rises from rest with a constant acceleration g/8.A stone is released from it when it has risen to height h. The time taken by the stone to reach the ground is

**Q.**

Distinguish between acceleration and retardation.

**Q.**

A car is being driven at a speed of 20m/sec when brakes are applied to bring it to rest in 5sec. The declaration produced in this case will be??

Answer is -4 m/sec square

Teacher plz explain the evaluation

**Q.**A balloon is flying up with a constant velocity of 5m/s. At a height of 100m, a stone is dropped from it. At the instant the stone reaches the ground level, the height of the balloon will be? ?