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Vf stands for__________

Final Velocity

Initial Velocity

tf-ti is_________

A

Change in velocity

B

Change in position

C

Initial Velocity

D

time interval

Choose the option in which object is being accelerated

A car moving in east direction with a constant velocity of 2m/s

A car moving with a velocity of 40Km/hr stops at traffic signal

Choose the correct unit of acceleration

A

m

B

m/s

C

s2m

D

Km

Choose the correct formula to calculate acceleration

A

a= vf-vi/tf-ti

B

a=Xf-Xi/tf-ti

C

a=vf/ti

D

a= Vf-tf/Vi-ti

AFL 1

An athlete runs east of the starting line (the origin). She runs at a velocity of 3 m/s, then speeds up to a velocity of 5 m/s . What is her average acceleration if the time interval is 20 s?

An athlete runs east of the starting line (the origin). She runs at a velocity of 3 m/s, then speeds up to a velocity of 5 m/s . What is her average acceleration if the time interval is 20 s?

0.1 m/s^2

-0.1m/s^2

A race car's forward velocity increases from 4.0m/s to 36 m/s over a 4s time interval. What is the acceleration?

A

8m/s^2

B

4m/s^2

C

10m/s^2

D

8m/s

A box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest. Find the acceleration.

A

7m/s^2

B

3m/s^2

C

9m/s^2

D

10m/s^2

Refer to the graph in Level 2 question in your worksheet. What is the acceleration between 5s- 15s

A

Positive acceleration

B

Zero acceleration

C

negative acceleration

D

none of the above

Now I know how to calculate acceleration mathematically and from v-t-graph

Yes

No

Yes but i need more practice

Today I learned