Acceleration

Question 1

What is acceleration?

Answer 1

Acceleration is the change in velocity in a certain amount of time.

Acceleration indicates how quickly an object is speeding up or slowing down.

Question 2

How is average acceleration calculated?

Answer 2

Average acceleration can be calculated using the formula: (v - u) / time, where u is the initial velocity and v is the final velocity.

‘v’ is the final velocity and ‘u’ is the initial velocity, both measured in m/s.

Question 3

What is deceleration?

Answer 3

Deceleration is negative acceleration, which occurs when an object slows down.

It represents a decrease in velocity over time.

Question 4

Estimate the deceleration of a car that stops from 15 m/s in 1 second.

Answer 4

The deceleration is approximately -15 m/s².

This is calculated as (0 - 15) / 1.

Question 5

What is uniform acceleration?

Answer 5

Uniform acceleration refers to constant acceleration.

It means the rate of change of velocity is the same over time.

Question 6

What is the approximate value of acceleration due to gravity near the Earth’s surface?

Answer 6

Acceleration due to gravity (g) is roughly equal to 10 m/s².

This value is also the same as the gravitational field strength.

Question 7

What equation is used for uniform acceleration?

Answer 7

The equation is v² = u² + (2 × a × s), where v is final velocity, u is initial velocity, a is acceleration, and s is distance.

This equation can help calculate the final speed of an object undergoing uniform acceleration.

Question 8

If a van is traveling at 23 m/s and decelerates at 2.0 m/s², how do you find its speed after traveling 112 m?

Answer 8

Rearrange the equation v² = u² + (2 × a × s) and input the values, considering ‘a’ as negative due to deceleration.

The final speed can be calculated by taking the square root of the resulting value.

Question 9

What is the result when a ball is dropped from a height and hits the ground at 5 m/s?

Answer 9

To calculate the height, use the formula h = (v²) / (2 × g), where g is the acceleration due to gravity.

In this case, g = 10 m/s².

Question 10

True or False: Acceleration is the same as velocity.

Answer 10

False.

Acceleration is the change in velocity over time, while velocity is the speed of an object in a given direction.

Question 11

Fill in the blank: The change in velocity is calculated as (v - ______).

Answer 11

u

‘u’ represents the initial velocity in the equation for average acceleration.