Question

If races are timed to an accuracy of 0.001 seconds, how far could a person rollerblading at a speed of 8.5 m/s travel in that period of time?

A) 0.0085 meters
B) 8.5 meters
C) 85 meters
D) 8500 meters

Answer 1

8.5 m

Step-by-step explanation:

The distance an object moving at a uniform speed of v =8 5. m/s will travel during a time interval

of Δt = 1/1000 s = 1.0×10^−3 s is given by

Δx = v(Δt ) = (8.5 m/s)(1.0×10^−3 s) = 8.5×10^−3

m = 8.5 m

Answer 2

To determine the distance traveled in 0.001 seconds by a person rollerblading at 8.5 m/s, multiply speed by time, yielding 0.0085 meters as the distance, which is answer A) 0.0085 meters.

Step-by-step explanation:

If races are timed to an accuracy of 0.001 seconds, to find out how far a person rollerblading at a speed of 8.5 m/s can travel in that period of time, you simply multiply the speed by the time. Therefore:

Distance = Speed × Time

Distance = 8.5 m/s × 0.001 s = 0.0085 meters

The person would travel 0.0085 meters in the time period of 0.001 seconds. Therefore, the correct answer is A) 0.0085 meters.