The SI of velocity is

The initial velocity of a body is u.It is under uniform acceleration a its velocity v at any time t is given by

In 12 minutes a car whose speed is 35 km/h travels a distance of

The initial velocity of a train which is stopped in 20 s by applying brakes retardation due to brakes being 1.5 \(ms^{ -2 }\) is

A wooden slab starting from rest slides down a 10 m long inclined plane with an acceleration of 5 \(ms^{ -2 }\) what would be its speed at the bottom of the inclined plane?

A car increases its speed from 20 km/h to 50 km/h in 10 seconds .Its acceleration is

Displacement is a .......... quantity and distance is a ..................... quantity

What is the SI unit of displacement?

Define speed of body.

What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?

What can you say about the motion of an object whose distance-time graph is a straight line parallel to the time axis?

A body moves in a circle of radius '2R' What is the distance covered and displacement of the body after 2 complete rounds?

Distinguish between speed and velocity.

What do you mean by the term retardation? Give two examples of such a motion

A train starting from a railway station and moving with uniform acceleration attains a speed 40 km h^–1 in 10 minutes. Find its acceleration.

An object may appear to be moving for one person and stationary for some others. For the passengers in a moving bus, the roadside trees appear to be moving backward. A person standing on the roadside perceives the bus alongwith the passengers as moving. However, a passenger inside the bus sees his fellow passengers to be at rest. So motion is not absolute, it is relative.
(a) Are rest and motion absolute or relative terms?
(b) Can an object be at rest as well as in motion at the same time?
(c) You are walking towards India Gate. Is India at rest with respect to you or it is moving with respect to you?

Describe the various types of motions observed in bodies.

What is meant by motion in a straight line? Give some examples of each a motion.

Give two differences between distance and displacement

You must have the story of the hare and tortoise. The two started simultaneously from the same point for a common destination. The hare slept for sometime along the way, and the tortoise reached the destination first. Since in this journey the tortoise took less time than the hare, the average speed of the tortoise was greater than that of the hare. But everyone knows that when the hare was actually running, it was much faster than the tortoise.
(a) Define the term speed.
(b) What is the S.I. unit of speed?
(c) Define average speed.
(d) Can the average speed of an object be negative?

What is non-uniform motion? Give some examples.

On a 100 km track , a train travels the first 30 km at a uniform speed of 30 km \(h^{ -1 }\)How fast must the train travel the next 70 km so as to average 40 km \(h^{ -1 }\) for the entire trip?