Question

A car starting from rest has a constant acceleration of 4 meters per second per second. How fast will it be going in 5 seconds? 1.25 m/s (B) 4 m/s 5 m/s (D) 20 m/s

Answer 1

To calculate the final velocity of the car after 5 seconds, we can use the formula:

v = u + at

where:

• v = final velocity
• u = initial velocity (which is 0 m/s since the car is starting from rest)
• a = acceleration (4 m/s^2)
• t = time (5 seconds)

Plugging in the values, we have:

• v = 0 + 4 * 5
• v = 0 + 20
• v = 20 m/s

Therefore, the car will be going at a speed of 20 m/s after 5 seconds. So, the correct option is (D) 20 m/s.