Question

6.Explain what you know that the odometer of a car measures. Give an example.

7.The slope of position (x) versus time graph is equal to

8.You drive for 20 minutes at 20 mi/hr and then for another 20 minutes at 40 mi/hr. What is your average speed for the whole trip?

A) 10 mi/hr
B) 20 mi/hr
C) 30 mi/hr
D) 40 mi/hr
E) 25 mi/hr

9.Would a driver traveling at 15 m/s in a 35 mi/h zone be exceeding the speed limit? (Yes or No answer is not acceptable. Do calculations and present your results and answer). 1 mi = 1609 m3600 s = 1 h.

10.15.34 ft x 2.3 ft (solve this problem and report the answer to the correct number of significant figures).

11.A particle at t₁ = 2.0 s is at x₁ = - 3.4 cm and at t₂ = 4.5 s is at x₂ = 8.5 cm. What is its average velocity?

12.

A sprinter accelerates from rest to 10.0 m/s in 1.35 s. What is her acceleration (a) in m/s² (b) in km/h².

13.

Compare the acceleration of a motorcycle that accelerates from 60 km/h to 70 km/h with the acceleration of a bicycle that accelerates from rest to 10 km/h in the same time.

A) Not the same
B) The same
C) Not sure
D) That of the motorcycle is greater
E) That of the bicycle is greater

Answer 1

6) If you drive your car to the office in the morning and drive it home again
at night, the odometer shows a gain of, say, 15 miles, even though the
displacement is zero ... the car ended up exactly where it started.

Even a better example: If you drove your car back to the dealer's showroom
where you picked it up 5 years ago, the displacement for that 5 years would
be zero, although the odometer reads 100,000 miles.

The odometer displays the distance the car moves, and adds another inch every
time the car moves an inch. Distance and displacement have the same magnitude
only over a period of time when the travel was all in a straight line, with no turns
or curves.