Scientists want to place a telescope on the moon to improve their view of distant planets. The telescope weighs 200 pounds on Ea
2 answers:
Answer:
33.33 pounds
Explanation:
Moon's effect of gravity is the effect of gravity on Earth. Thus, an object which weighs w on Earth would weigh
on the moon.
Given:
weight of telescope on Earth, w = 200 pounds
Calculation:
weight of telescope on Moon =
=
Thus, the weight of the telescope on moon would be 33.33 pounds.
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Answer:
a) Fg = -27.4 N
b) Fnet = 5.2 N
c) a = 1.9 m/s2
Explanation:
a)
- There are two forces acting on the ball, one directed upward (assuming this direction as positive, along the y-axis) which is the tension on the string (lifting force), and another aimed downward, which is the attractive force due to gravity.
- Applying the Newton's Universal Law of Gravitation to a mass close to the surface of the Earth (in this case the ball), we can take the acceleration due to gravity like a constant, that we call by convention g, equal to -9.8 m/s2.
- So, we can write the following expression for Fg:
b)
- The net force on the ball, will be just the difference between the lifting force (32.6 N) and the force due to gravity, Fg:
c)
- According Newton's 2nd Law, the acceleration caused by a net force on a point mass (we can take the ball as one) is given by the following expression: