Ith air resistance acting on an object that has been dropped, the object will eventually reach a terminal velocity, which is around 53 m/s (195 km/h or 122 mph) for a human skydiver. ... (On the Moon, the gravitational acceleration is much less than on Earth, approximately 1.6 m/s2.)
Answer:
a) 3.00×10⁸ m/s
b) 2.9979×10⁸ m/s
c) 2.997925×10⁸ m/s
Explanation:
299792458 m/s is the speed of light
Let us write this in scientific notation first
2.99792458×10⁸ m/s
a) In three significant figures
We need to round the number to the hundredths place
3.00×10⁸ m/s
b) In five significant figures
We need to round the number to the ten thousandths place
2.9979×10⁸ m/s
c) In seven significant figures
We need to round the number to the millionths place
2.997925×10⁸ m/s
Answer:
297.8 m
Explanation:
We are given that
Acceleration=
Time,t=19 s
We have to find the distance covered by the train when it reach its top speed if starting from rest.
Initial speed=u=0
Using the formula
Hence, the train covered 297.8 m when the train go to reach its top speed if starting from rest.
Answer and Explanation:
By measuring in millimeter we can decrease the associated error with the measurement because when we measure in smaller unit the measurement is more precise and accurate rather than when we measure in larger unit so when we measure 325 millimeter instead of 32.5 cm then there is chance of less error produced.
Answer:
40 J
Explanation:
In the case of a rectilinear movement, the work is calculated as the product of Force (N) * movement (m). In your case, unless the angle between the force vector and the displacement vector is different from 0, the work is:
20 N * 2 m = 40 J
