Motion Test

Question 1

23) Ben is exercising his pony on a large, oval track. The pony is trotting at a constant speed of 10 m/s around the track. Which statement can be made about the pony’s motion?

Answer 1

The pony is accelerating.

U6C2 pg 12

Question 2

24) What would a line representing a car with zero acceleration look like on a graph?

Answer 2

Straight left to right

U6C2 pg 12

Question 3

27) Can the velocity of a car change when it’s speed is constant?

Answer 3

Yes because velocity is speed plus direction. You could be moving at a constant speed but changing direction thus velocity changes.

U6C3 pg 3

Question 4

34) A man is riding his 4-wheeler at 60 km/hr. If he is riding it constantly at this rate for 1.5 hours, how far did he ride

Answer 4

D= 90 km

I put km/hr instead of just km

Question 5

35) The space shuttle is flying at 2.0 km/hr and lands on the runway. It slows down to 0.5 km/hr. If this takes 0.25 hrs. What is your acceleration?

Answer 5

Substitute: a=5-2/ 0.25

I accidentally put Vi in the place of Vf

Question 6

38) A boat is traveling at 43.2 km/hr. It then goes down a faster part of the river and is now going 144 km/hr which gave the boat an acceleration of 25.2 km/hr ². How long did it take the boat to reach its new speed?

Answer 6

T=4hr

I did the math wrong while solving

Question 7

39) A competitive go-cart driver is traveling 32 m/s. He sees a caution flag go up, so he slows at a rate of -1.5 m/s ² in 10.8 s, what is his final velocity?

Answer 7

VF= -16.2 + 32
VF= 15.8 m/s forward 

(I left of the negative on the 16.2)