The mass of a pendulum bob is 0 2kg, and it is suspended by a string 1m long It - Physics - Work Energy And Power

Question

The mass of a pendulum bob is 0 2kg, and it is suspended by a
string 1m long It is pulled aside until the thread is at
300 to the vertical How much work is done? The ball is
now released Find the K E at the lowest point? g=
10m/s2

Somnath physics · Accepted Answer

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Here,
θ = 300
L = 1 m
m = 0 2 kg
g = 10 ms-2
Work done is stored as PE in the bob
PE = mgh
= 0 2×10×1×(1 – cos300)
= 0 2×10×(1 – 0 87)
= 0 26 J
At lowest point
PE = KE
So, KE = 0 26 J

The mass of a pendulum bob is 0.2kg, and it is suspended by a string 1m long. It is pulled aside until the thread is at 300 to the vertical. How much work is done? The ball is now released. Find the K.E. at the lowest point? g= 10m/s2 .

The mass of a pendulum bob is 0.2kg, and it is suspended by a string 1m long. It is pulled aside until the thread is at 30⁰to the vertical. How much work is done? The ball is now released. Find the K.E. at the lowest point? g= 10m/s².