1. A car is travelling at 20 m/s. It accelerates uniformly at 3 m/s2 for 5 S.
a. Calculate the distance the car travels while it is accelerating.
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Given:-
→Initial velocity of the car=20m/s
→Acceleration of the car=3m/s²
→Time=5s
To find:-
→Distance travelled by the car while it is accelerating.
Solution:-
By using the 2nd equation of motion,we get:-
=>s=ut+1/2at²
=>s=20×5+1/2×3×(5)²
=>s=100+1.5×25
=>s=100+37.5
=>s=137.5m
Thus,the car travels a distance of 137.5m
while it was accelerating.
Some Extra Information:-
The 3 equations of motion are:-
•v=u+at
•s=ut+1/2at²
•v²-u²=2as
Note: The above 3 equations are only valid when a body is moving with uniform acceleration.
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