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प्रश्न
An archer shoots an arrow in the air horizontally. However, after moving some distance, the arrow falls to the ground. Name the initial force that sets the arrow in motion. Explain why the arrow ultimately falls down.
उत्तर
The archer shoots an arrow by applying muscular force to stretches the string of the bow. When the string is released, it regains its original position that provides the initial force to set the arrow in motion horizontally.
The force of gravity that acts on the arrow in the downward direction and hence, the arrow ultimately falls to the ground.
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संबंधित प्रश्न
When an elephant drags a wooden log over the land, the forces that are applied on the log are ______, ______ and ______.
Match the following:
| Group ‘A’ | Group ‘B’ | ||
| (i) | An ox pulling a cart | (a) | Magnetic force |
| (ii) | Lifting a heavy iron object with a crane | (b) | Electrostatic force |
| (iii) | Weighing with a spring balance | (c) | Muscular force |
| (iv) | Applying brakes to a bicycle | (d) | Gravitational force |
| (v) | Picking up pieces of paper with a plastic scale | (e) | Frictional force |
One or more forces are acting in the following example. Name them.
An object falling from a tall building: ______
One or more forces are acting in the following example. Name them.
Winnowing foodgrain: ______
Explain in your own words and give one example.
Magnetic force
Why an object thrown upwards comes down after reaching a point?
Force executed by touching the body is called non–contact force.
Gravity pushes the ripen coconut from the tree to the ground.
There are three solids made up of aluminium, steel and wood, of the same shape and same volume. Which of them would have the highest inertia?
Two rods of the same weight and equal length have different thickness. They are held vertically on the surface of sand as shown in figure. Which one of them will sink more? Why?
