Question

The table shows the changes in velocity for several different cars. Each change takes place over a 10-second interval. Which cars are either
speeding up or slowing down?
Starting Velocity
Ending Velocity
Car A
30 km/h
30 km/h
Car B
O km/h
20 km/h
Car C
30 km/h
O km/h
Car D
O km/h
O km/h
Car E
20 km/h
30 km/h.

Answer 1

Answer:

B, C, E are the right answers

Explanation:

I got this question on a test and got these as the right answers

Answer 2

Car B and E are speeding up, while car C is slowing down.

Step-by-step explanation:

Acceleration (a) is the rate of change of velocity with time.It is calculated by dividing the change in velocity (Δv) with the time taken for the change to occur.In this question , the time is 10 sec in all cases.You divide the velocity in km/h by 3.6 to convert to m/s

In Car A

Δv=8.33-8.33=0m/s

t=10s

a=0 m/s² ⇒car is moving with same speed and in the same direction

Car B

Δv=5.55-0=5.55

t=10

a=5.55/10 =0.555 m/s² ⇒car is speeding up

Car C

Δv = 0-8.33= -8.33 m/s

t= 10

a= -8.33/10 = -0.833 m/s² ⇒car is slowing down

Car D

Δv= 0-0 =0

t=10s

a=0/10 =0 m/s² ⇒car is at rest

Car E

Δv = 8.33-5.55=2.78

t=10

a=2.78/10 = 0.278 m/s²⇒car is speeding up

Learn More

To find acceleration : brainly.com/question/13154163

Keyword : velocity

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