When you shake a tree, fruits fall because of ________.
Gravity and Inertia of rest
Correct Answer: Gravity and Inertia of rest
When a tree is shaken:
- The branch is accelerated (back and forth) by the external force.
- The fruit, due to inertia of rest (Newton's 1st Law), tends to remain in its original position and does not immediately follow the branch's motion.
- This relative movement causes the fruit's stalk to break.
- Gravity then pulls the fruit downward.
Inertia of motion would apply if the fruit was already in motion — which is not the case here. The fruit is initially at rest relative to the tree before shaking begins.
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Important Questions from Laws of Motion
Which of the following is correct?
I. The mass of an object is a measure of its inertia
II. In an isolated system the total momentum remains conserved
A 20.0 kg block is placed on a smooth horizontal table. A horizontal force of 12.0 Newton is applied to the block. The position of the block at 5.0 sec is
A subway train starts from rest at a station and accelerates at a rate of 3 ms-2 for 10s. It then runs at a constant speed for 20s and decelerates at 5 ms-2 unit it stops at the next station. The distance between the two stations is:
In a desert, a beetle's motion sends fast longitudinal pulses, vL = 150 ms-1, and slower transverse pulses, vS = 50 ms-1, along the sand's surface. The sand scorpion has eight legs; spread roughly in a circle of 5 cm diameter, intercepts the faster longitudinal pulses 4.0 ms earlier than the slower transverse pulse. The pray is located at a distance of:
When we jump out of a boat, the boat moves in the opposite direction. This is due to:
