Question

Given a car moving at 2 m/s with an average acceleration of 3 m/s², what will be its speed 5 seconds later?

A) 17 m/s
B) 15 m/s
C) 12 m/s
D) 7 m/s

Answer 1

Using the acceleration formula V = u + at, the final speed of the car after 5 seconds with an average acceleration of 3 m/s² from an initial speed of 2 m/s is calculated to be 17 m/s.

Step-by-step explanation:

Given a car moving at an initial speed of 2 m/s with an average acceleration of 3 m/s², the speed of the car 5 seconds later can be determined using the formula for acceleration, which is:

V = u + at

where:

• V is the final velocity,
• u is the initial velocity,
• a is the acceleration,
• t is the time.

Plugging in the values given:

V = 2 m/s + (3 m/s² * 5 s)

V = 2 m/s + 15 m/s

V = 17 m/s

Therefore, the car's speed 5 seconds later will be 17 m/s.