A bus is moving along a straight line at 20 m/s undergoes an acceleration of 4m/s after 2 seconds, its speed will be.

Correct option is D

The correct answer is (d) 28.

To determine the bus's speed after 2 seconds, we can use the kinematic equation:

Final velocity (v) = Initial velocity (u) + (Acceleration (a) × Time (t))

Given:

• Initial velocity, u = 20 m/s
• Acceleration, a = 4 m/s²
• Time, t = 2 seconds

Plugging in these values:

v = 20 m/s + (4 m/s² × 2 s)

Calculating the product of acceleration and time:

4 m/s² × 2 s = 8 m/s

Adding this to the initial velocity:

20 m/s + 8 m/s = 28 m/s

Therefore, the bus's speed after 2 seconds is 28 m/s.

The correct answer is (d) 28 m/s.