Question

Study the speed time graph of a body given below and answer the following questions
A) what type of motion is represented by OA
B) what type of a motion is represented by AB
C) what type of a motion is represented by BC
D) find out the acceleration of a body
E) calculate the retardation of the body
F) find out the distance travelled by a body from A to B

Answer 1

Answer:

A) non uniform mation or accelerated motion

B) uniform motion

C) non-uniform or decelerated motion

D) acceleration = slope of graph =6/4

=1.5m/s^2

E) distance traveled = area under graph line

=area of rectangle ABDE

=AB*BD

=6*6

=36cm^2

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Answer 2

Given:

Time loops = 4, 10 and 16

To Find:

Motions represented in OA, AB and BC

and the distance travelled from A to B.

Solution:

1. In the region OA - The velocity

increases uniformly with time, thus it

represents uniform acceleration.

2. In the region AB - The body moves

with a constant speed, and hence moving

with zero acceleration.

3. In the region BC - The velocity

decreases uniformly with time, and

represents a uniform retardation.

4. Acceleration of the body OA = 6-0/ 4-0

= 6/4 = 1.5m/s?

5. Retardation in the body

= 6/16 = 1m / s?