The correct answer is (a.) The rider uses energy to do work going up the mountain. As the law of conservation of energy states that the total energy must be constant, therefore, the energy that is used to go up will be as it is to go down.
Answer: Because the force of gravity depends on the size of the planet, so a smaller planet will have less gravitational force than a larger planet. So our gravitational force is not as strong as a bigger planet so we can still stand up and jump normally but on a smaller planet we could jump higher and on a bigger planet, we could not even be able to jump at all.
Answer: The answer will be R1 = B
Explanation:
Cause Here x component of A = A
X component of 2B = 2BcosФ
X component of Resultant = 0
I.e. A + 2BcosФ = 0
cosФ = -A/2B
also R1 = √(A² + B² + 2ABcosФ)
=√ [A² + B² + 2AB(-A/2B)]
=√A² + B² -A²
R1 = √B²
R1 = B so R1 = B is correct.
The correct answer to your question here is D
Answer:
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