Question

A motorcycle moving at a constant velocity suddenly accelerates at a rate of 4.0 m/s² to a speed of 35 m/s in 5.0s. What was the initial speed of the motorcycle?

A. -34 m/s
B. -15 m/s
C. 15 m/s
D. 34 ms

Answer 1

The initial speed of the motorcycle was 15 m/s.

Step-by-step explanation:

To find the initial speed of the motorcycle, we need to use the equation of motion that relates velocity, acceleration, and time: V = U + at. Here, V is the final speed (35 m/s), U is the initial speed (what we want to find), a is the acceleration (4.0 m/s²), and t is the time (5.0 s).

Plugging in the values, we get: 35 = U + 4*5.0. Simplifying the equation, we have: 35 = U + 20. Subtracting 20 from both sides, we get: 15 = U.

Therefore, the initial speed of the motorcycle was 15 m/s.