1.

The acceleration time graph (at) of a particlemoving with initialspeed of 45 m/sbelow.the velocity of a body at t = 20s isomis showna cms 2)- 2​

Answer»

Explanation:

Given : V i = 2m/s at t=0 s

Let V f be the velocity of the particle at t=4 s

Area under the a-t graph GIVES the CHANGE in velocity of the particle during that period.

∴ ΔV = V f − V i

= 1 ×4×4 = 8

2

OR V f −2=8

⟹V f = 10m/s



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