Answer:
A racing car has a uniform acceleration of 4m/s square, it will cover 200m in 10sec after start.
Given
- The initial velocity (u) = 0
- The acceleration (a) = 4m/s
- Time (t) = 10 sec
Need to find
The final velocity (v) = ?
Solution
Motion is the phenomenon in which an object changes its position. The first equation of motion is given as:
v = u + at
Where,
- v = final velocity
- u = initial velocity
- a = acceleration
- t = time taken
Substitute the given parameters in the above equation.
v = 0 + 4 × 10
v = 0 + 40
v = 40m/s
The third equation of motion is given as:
=
Where,
- v = final velocity
- u = initial velocity
- a = acceleration
- t = time taken
Substitute the known parameters in the above equation.
(40)2 = 2 x 4 x s
1600 = 8s
s = 1600/8
s = 200 m
∴ Distance it will cover in 10sec after start is 200m
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