Question

obseve the adjecent graph and answer the following questions​

Answer 1

Answers are as follows:

i) The average speed of the object is

a) 0.5 km/min

b) 1 km/min

c) 5 km/min

d) 2 km/min

Explanation:

• Average speed = Total distance traveled/Total time taken

= Total distance traveled/Total time taken

= 15 + 0 + 15 - 20/20

• I've taken (-20) as the distance traveled is now decreasing.

= 30 - 20/20

= 10/20

= 0.5 km/min

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ii) The motion of the body is:

a) Uniform

b) Non uniform

c) Stationary

d) motion with decreasing speed

Explanation:

• Clearly, as the body is covering unequal distance and in unequal time, the motion of the body is non uniform.

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iii) The DE part of the graph indicates

a) Decreasing speed

b) uniform motion

c) object is at rest

d) non uniform motion of object

Explanation:

• As, you can clearly notice the distance covered by the body is decreasing therefore, speed will also decrease & a sloping coming downwards indicates decreasing speed.

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iv) Is the speed same in AB & CD. [Yes/No]

Explanation:

• Speed at AB = 15/6 = 2.5 km/min
• Speed at CD = 15/6 = 2.5 km/min

Therefore, speed at AB will be same as at CD.

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v) Average speed of the object in section DE

a) 5 km/min

b) 10 km/min

c) 10/3 km/min

d) 3/10 km/min

Explanation:

• Speed at DE = 20/6 = 10/3 km/min

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Thank youu!! :))