4.Which could be an example of a unbalanced force *
A plate placed on a dining table
A ball at the top of a hill at rest position
A basket ball that is hit with a bat
A car moving with a constant speed
Answers
Given : A plate placed on a dining table
A ball at the top of a hill at rest position
A basket ball that is hit with a bat
A car moving with a constant speed
To Find : Which could be an example of a unbalanced force
Solution:
balanced force = Rate of change of momentum is zero.
A plate placed on a dining table
There is no motion involved here : Rate of change of momentum is zero.
Hence balanced force
A ball at the top of a hill at rest position
There is no motion involved here : Rate of change of momentum is zero.
Hence balanced force
A basket ball that is hit with a bat
Speed of ball can change in this case hence there will be change in momentum
Hence unbalanced force
A car moving with a constant speed
Rate of change of momentum is zero. as moving with a constant speed
Hence balanced force
A basket ball that is hit with a bat could be an example of a unbalanced force
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