For what condiion, an object could be considered as a point object? Describe in brief

2

(a)

The displacement o a particle is given by at². What is the dependency of accleration on time?

2

(a)

Thye position x of a body is given by x = A sin(wt). Find the time at which the displacements is maximum.

2

(a)

What are uses of a velocity  - time graph ?

2

(a)

The position of an object is given by x  = 2t² + st. Find out that its motion is uniform and nonuniform.

2

(a)

The distance travelled by a body is proportional  to the square of time. What type of motion this body has?

2

(a)

The odometer of Raja's car reads 1700 km at the start of a trip and 2500 km at the end of the trip. The trip took 16h.What is the average speed of Raja's car in ms^-1?

2

(a)

A body covers half of its journey with a speed of 40 m/s and half with a speed of 60 m/s. What is the average speed during the whole journey?

2

(a)

What is meant by 'point object' in physics?

2

(a)

What is the significance of the slope of x-t graph?

2

(a)

Why the speed of an object can never be negative?

2

(a)

What is common between the two graphs shown in Figs. (a) and (b)?

2

(a)

Define one dimensional motion.

2

(a)

Explain the difference between uniform velocity and variable velocity.

2

(a)