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A simple pendulum is constructed with a 3 kg mass attached to the ceiling with a 25 cm long string. What is the magnitude of the restoring force acting on the mass when the angle to the vertical is $30^{\circ}$?(A) 1.5 N(B) 3 N(C) 6 N(D) 15 N

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Chapter 13

Practice Test 3

Section 1

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Hi in the giving problem must of the bob attached with the simple pendulum. Is M Is equal to three kg land of the string Is L. is equal to 25 centimetre. Yeah, this bob is displaced from the vertical such that it's a spring is making An angle of 30° with the vertical. In this state, weight of this bob will be acting vertically downward. Such components will be having two components, one along the length of the string. MG cost 30° and another towards some in position. Mg sine 30 degrees or three to whatever we can say. So this Component and design 30° will serve as the restoring force acting or work the simple pendulum so this is given as MG. Sign 30 degree Or we can say this is three kg in 2 10 meter per second squared Into for sign 30. This is one x 2. So finally Here it comes out to be 15 Newtown is the restoring force acting on the bob. So we can say here, our option B is correct. Thank you.

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