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A pendulum has a mass of 0.7 kg and starts at a height of 1.1 m. If it is released from rest, how fast is it going when it reaches the lowest point of its path? Acceleration due to gravity is g = 9.8 m/s2.

Respuesta :

RickyChen
Assume no friction present, and the wire never deforms.

Then mgh = 1/2 mv^2

9.8*1.1 = 1/2v^2

v = 4.64 m/s

m*g*h = 1/2 mv^2

9.8*1.1 = 1/2v^2

v = 4.64 m/s

What is velocity ?

"Velocity is essentially a vector quantity. It is the rate of change of distance." It is the rate of change of displacement. Speed of an object moving can never be negative. The velocity of a moving object can be zero.

What is mass ?

"Quantitative measure of inertia, a fundamental property of all matter." It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body, the smaller the change produced by an applied force.

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