Question

Which of the following actions in a car cause it to accelerate? Select all that apply.

a) None of these
b) Stepping on the gas pedal to speed the car up
c) Pressing the brake pedal to slow the car down
d) Turning the steering wheel to drive in a curved path at constant speed

Answer 1

Answer:

Option (b) will be correct answer for accelerating the car

Explanation:

For accelerating the car we have to speed up the car

In option (b) it is given that stepping on the gas pedal to speed up the car so it is correct answer

In option (c) it is given that pressing the pedal to slow down the car it is a case of deceleration so it is a incorrect statement.

In option (d) it is given that speed is constant at curved path so acceleration will be zero because if there is no change in velocity then acceleration will be zero  

Answer 2

Answer:

option (a)

Explanation:

The acceleration is defined as the rate of change of velocity. It is a vector quantity and its SI unit is m/s^2.

Acceleration = rate of change of velocity

$a = \frac{v-u}{t}$

As the car is accelerating, it means we are pushing the accelerating paddle.

So, the stepping on the gas pedal to speed the car up.

Thus, option (a) is correct.