A car starting from rest and moving with uniform acceleration attains a speed of 90 km/h in 20 second on a express highway. Calculate the acceleration.
Please answer
Answers
Explanation:
acceleration= change in velocity÷time
=(v-u) ÷t
=(90-0) ÷20
=90÷20
=4.5
acceleration is 4.5
Answer:
The acceleration exists at 4.5.
Explanation:
"The acceleration of the object in obtaining from u to v in time t exists given by
Acceleration, a = (v-u)/ t.
Absolute velocity (v) of an object equals initial velocity (u) of that object plus acceleration (a) of the object times the elapsed time (t) from u to v.
Velocity, v = u + at
There exists no requirement to derive this, as it exists the description for acceleration: the change in velocity in unit time." Acceleration exists at the rate at which velocity varies with time, in times of both speed and direction. A point or an object moving in a straight line exists accelerated if it speeds up or delays down.
Acceleration = change in velocity/ time
Acceleration = (v - u)/ t
= (90 - 0)/ 20
= 90/ 20
= 4.5
Therefore, the acceleration exists at 4.5.
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