Answer:
Explanation:
Let the tension in the string be T . At the top of the circle , total force acting on them = T + mg . This will provide centripetal force
T + mg = m v² / r
4 + .25 x 9.8 = .25 x v² / .62
6.45 = .25 v² / .62
v² = 16
v = 4 m /s .
Answer:
Meter, Gram and Liter.
Explanation:
In the metric system, the standard units for the below are;
Length - Meter
Mass - Gram
Volume - Liter.
Answer:
The following is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
That is from our solar system
Explanation:
This is in the thermosphere which is at an altitude of 85-520km
Answer:
m = 81281.5 pounds.
Explanation:
Given that,
Force, F = 73 kN
Acceleration of the space shuttle, a = 16000 mi/h²
1 miles/h² = 0.0001241 m/s2
16000 mi/h² = 1.98 m/s²
We need to find the mass of the spacecraft.
According to Newton's second law,
F = ma
m is mass of the spacecraft

Since, 1 kg = 2.20462 pounds
m = 81281.5 pounds
Hence, the mass of the spacecraft is 81281.5 pounds.