Explanation:
U = 40m/s
V = 30m/s
T = 5 sec
A = ?
since it's decreasing in speed, The acceleration will be " - 2.0ms^-2 " or " - 2.0m/s^2 "
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Using Newton's Second Law, we can find the air resistance. We know the net force is equal to mass times acceleration.
The answer is C. How close a measured quantity is to its actual value
The significant figures of a number are digits that carry meaning contributing to its measurement resolution. The basic concept of significant figures is often used in connection with rounding. Rounding to significant figures is a more general-purpose technique than rounding to n decimal places, since it handles numbers of different scales in a uniform way.
The track has a circumference of 400 m. This is the distance traveled per lap.
Because the person made 8 laps, the total distance traveled is
8 * 400 = 3200 m
The time taken for the 8 laps is 14.0 min = 14*60 = 840 s.
The average velocity
= distance/time
= (3200 m)/(840 s)
= 3.8095 m/s
Answer: 3.8 m/s (nearest tenth)
Answer:
632.8 nm is the wavelength (in air) of red light from a helium neon laser.