Question #5366

A 34 kg child on a 1.0 m long swing is released from rest when the swing supports make an angle of 23.3 with the vertical.

The acceleration of gravity is 9.81 m/s^2.

a) What is the maximum potential energy associated with the child?

Answer in units of J

b) Disregarding friction, ﬁnd the child’s speed

at the lowest position.

Answer in units of m/s

c) What is the child’s total mechanical energy?

Answer in units of J

d) If the speed of the child at the lowest position is 0.986 m/s, what is the change in mechanical energy due to friction?

Answer in units of J

The acceleration of gravity is 9.81 m/s^2.

a) What is the maximum potential energy associated with the child?

Answer in units of J

b) Disregarding friction, ﬁnd the child’s speed

at the lowest position.

Answer in units of m/s

c) What is the child’s total mechanical energy?

Answer in units of J

d) If the speed of the child at the lowest position is 0.986 m/s, what is the change in mechanical energy due to friction?

Answer in units of J

Expert's answer

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