1. A student driving a car travels 10.0 km in 30.0 min. What was her average speed? 2. Rolling along across the machine shop at a constant speed of 4.25m/s, a robot covers a distance of 17.0 m. How long did the journey take? 3. A car is traveling at 20.0 m/s when the driver slams on the brakes and brings it to a straight-line stop in 4.2 s. What is the magnitude of its average acceleration?
1. A student driving a car travels 10.0 km in 30.0 min. What was her average speed? 2. Rolling along across the machine shop at a constant speed of 4.25m/s, a robot covers a distance of 17.0 m. How long did the journey take? 3. A car is traveling at 20.0 m/s when the driver slams on the brakes and brings it to a straight-line stop in 4.2 s. What is the magnitude of its average acceleration?
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Transcribed Image Text:Physics103: Practice 1
Topics: Unit, 1D motion
Problems:
1.
A student driving a car travels 10.0 km in 30.0 min. What was her average speed?
2. Rolling along across the machine shop at a constant speed of 4.25m/s, a robot covers a distance of
17.0 m. How long did the journey take?
3. A car is traveling at 20.0 m/s when the driver slams on the brakes and brings it to a straight-line
stop in 4.2 s. What is the magnitude of its average acceleration?
An object starts from rest with a constant acceleration of 8.00 m/s² along a straight line, Find (a)
the speed at the end of 5.00s, (b) the average speed of the 5-s interval, and (c) the distance
4.
traveled in the 5.00s.
5. A stone is thrown straight upward with a speed of 20 m/s. It is caught on its way down at a point
5.0m above where it was thrown. (a) How fast was it going when it was caught? (b) How long did
the trip take?
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