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Question

Velocity is defined as v=u+5t, where u is fixed- 5 ms−1. Find v at different t.

A
v=5 ms1
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B
v=10 ms1
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C
v=15 ms1
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D
v=20 ms1
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Solution

Here, a body is moving with velociy v=u+5t and u is fixed- 5 ms1.
So, putting the value of u in the velocity equation, we get
v=5+5t.

Now, the velocity at time t = 0:
v=5+5×0=5+0 = 5 ms1

Now, the velocity at time t = 1:
v=5+5×1=5+5 = 10 ms1

Now, the velocity at time t = 2:
v=5+5×2=5+10 = 15 ms1

Now, the velocity at time t = 3:
v=5+5×3=5+15 = 20 ms1


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