Question

4. A lizard accelerates from 2 m/s to 10 m/s in 4 seconds. What is the lizard's average acceleration?

3. If a Ferrari, with an initial velocity of 10 m/s, accelerates at a rate of 50 m/s/s for 3 seconds, what
will its final velocity be?

Answer 1

4. The lizard's average acceleration is 2 m/s²

3. The final velocity will be 160 m/s

Step-by-step explanation:

Average acceleration is the final velocity minus the initial velocity per

time taken

4.

A lizard accelerates from 2 m/s to 10 m/s in 4 seconds

The initial velocity is 2 m/s

The final velocity is 10 m/s

The time is 4 seconds

We need to find the average acceleration

→ Average acceleration =
`(v-u)/(t)`, where v is the final velocity,

u is the initial velocity and t is the time

→ u = 2 m/s , v = 10 m/s , t = 4 s

Substitute these values in the rule above

→ Average acceleration =
`(10-2)/(4)=(8)/(4)=2` m/s²

The lizard's average acceleration is 2 m/s²

3.

If a Ferrari, with an initial velocity of 10 m/s, accelerates at a rate of 50 m/s²

for 3 seconds

Initial velocity is 10 m/s

Acceleration is 50 m/s²

Time is 3 seconds

We need to find the final velocity

Use the rule of acceleration above to find the final velocity

→ Acceleration =
`(v-u)/(t)`

→ u = 10 m/s , a = 50 m/s² , t = 3 s

Substitute these values in the rule

→
`50=(v-10)/(3)`

Multiply both sides by 3

→ 150 = v - 10

Add 10 to both sides

→ v = 160 m/s

The final velocity will be 160 m/s