Question

Li is riding her bicycle at 8.0 m/s. She slows down to 4.0 m/s. Her change in velocity is blank m/s. If Li takes 2 seconds to make this change, her acceleration is blank m/s2.

Answer 1

Given:-

• Initial velocity ,u = 8m/s

• Time taken ,t = 2

• Final velocity , v = 4m/s

To Find:-

• Acceleration ,a

Solution:-

As we know that acceleration is the defined as the rate of change of velocity .

• a = v-u/t

Substitute the value we get

→ a = 4-8/2

→ a = -4/2

→ a = -2m/s²

Here, Negative sign show deceleration

∴ The acceleration of the blank is 2m/s².

Additional Information!!

• The rate of change of velocity at per unit time is called acceleration .

• SI unit of acceleration is m/s²

• It is vector Quantity ( both magnitude and direction)

Answer 2

Answer:

do

Explanation: