It is as a result of gravity. (D)
This is as stated by Newton's law of universal gravitation. That two objects in the universe attract one another with a force that is proportional to the product of their masses and inversely proportional to the square of the distance apart.
The constant of proportionality is the Universal Gravitational Constant.
G = 6.673 × 10⁻¹¹ Nm²kg⁻²
Answer:
1200J
21.8Watts
Explanation:
Given parameters:
Force = 400N
Distance = 3m
Time = 55s
Unknown:
Work done = ?
Power = ?
Solution:
Work done is the force applied to move a body through a certain distance.
Power is the rate at which work is done
Work done = Force x distance = 400 x 3 = 1200J
Power =
=
= 21.8Watts
Answer:
m = 1.5 kg
Explanation:
Data:
- Aceleration (a) = 8 m/s²
- Force (F) = 12 N
- Mass (m) = ?
Use formula:
Replace in the formula:
Equate the newtons:
Simplify m/s²:
It divides:
What is the mass of the train?
The mass of the train is <u>1.5 kilograms.</u>