Can you explain the answer of this question below:A bus decelerating with 4m/s2changes its speed from 60 m s-1to a certain value in 5 s. The final speed is:A:40 m/sB:25 m/sC:60 m/sD:30 m/sThe answer is a.

Question

Can you explain the answer of this question below:A bus decelerating with 4m/s2changes its speed from 60 m s-1to a certain value in 5 s. The final speed is:&#8203;A:40 m/sB:25 m/sC:60 m/sD:30 m/sThe answer is a.

Answer

A: 40m/s

Answer

We use equation of. v=u+at where v=? u=60m/s a= -4. as it is decelerating we use negative sign t=5s so v=60+(-4)×5 =60-20 =40m/s

Answer

Explanation:

Given data:

Initial speed (u) = 60 m/s

Deceleration (a) = -4 m/s² (negative sign indicates deceleration)

Time taken (t) = 5 s

Final speed (v) = ?

Using the kinematic equation:

v = u + at

where,

v = final velocity

u = initial velocity

a = acceleration

t = time

Substituting the values in the equation:

v = u + at

v = 60 m/s + (-4 m/s² × 5 s)

v = 60 m/s - 20 m/s

v = 40 m/s

Therefore, the final speed of the bus is 40 m/s.

Hence, option A is the correct answer.

Answer

Solution:

Given,
Initial speed, u = 60 m/s
Deceleration, a = -4 m/s² (negative sign indicates deceleration)
Time, t = 5 s

We know,

v = u + at

where,
v = final speed
u = initial speed
a = deceleration
t = time

Calculation:

Substituting the given values in the above equation, we get:

v = u + at
v = 60 m/s + (-4 m/s²) × 5 s
v = 60 m/s - 20 m/s
v = 40 m/s

Therefore, the final speed of the bus after deceleration is 40 m/s.

Hence, option A is the correct answer.

Answer

By using the formula v=u+at v=sixty + -4 × 5 v=fourtySo the answer will be A

Answer

In this question a = -4m/s^(2) as it is retardation u = 60m/s t = 5s v = we have to find by       v=u +at v = 60+ (-4)(5) v = 60 - 20 v = 40

Answer

If we use the first equation of motion that is v = u+at u - 60 a - (-4) t - 5s v=60+(-4)×5 v=60+(-20) v=40

Answer

Acceleration = – 4m/s²; Initial speed, u = 60 m s^-1

Time taken = 5s

Acceleration = change in velocity per unit time

a=v-u/t

v= u + at

v = 60 – 4 x 5 = 40 m/s

Answer

A.

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