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Detailed solutions to the sat physics problems sample 2.
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A car, initially at rest a t = 0 seconds, moves at a constant acceleration along a straight road. If the car covers a distance of 10 meters in the first 2 seconds, what will be the speed of the car at t = 10 seconds?
A) 5 m/s
B) 1 m/s
C) 100 m/s
D) 50 m/s
E) 20 m/s
Solution
We first use the formula x = (1/2) a t2 to find the acceleration a as follows
10 = (1/2) a (2)2 which gives a = 5 m/s2
speed = a t = 5m/s2 10 s = 50 m/s
Answers to the Above Questions
- D
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