Question

1.What type of motion is represented by AB? 

2. What type of motion is represented by BC?

3. What type of motion is represented by CD?

4. Calculate the acceleration of the body?

5. Find out the retardation of the body. ​

Answer 1

Explanation:

→ In a velocity time graph, the slope of graph tell us about the acceleration. If the slope is high then the acceleration is positive, if the solve is low then the acceleration is negative and if the slope is parallel to time axis then there is no acceleration taking place!

Required solution:

(a) What type of motion is represented by AB? 

Answer: AB show accelerated motion.

(b) What type of motion is represented by BC?

Answer: BC show uniform motion. Here velocity is constant.

(c) What type of motion is represented by CD?

Answer: CD show uniform retardation motion.

(d) Calculate the acceleration of the body.

Answer:

→ Acceleration = Change in velocity/Time taken.

→ a = (v-u)/t

→ a = (300-100)/5

→ a = 200/5

→ a = 40 mps sq.

→ Acceleration = 40 mps sq.

(e) Find out the retardation of the body. 

→ Acceleration = Change in velocity/Time taken.

→ a = (v-u)/t

→ a = (0-300)/10

→ a = -300/10

→ a = -30 mps sq.

→ Retardation = -30 mps sq. $\:$