Frequently Asked Questions
We make a muscular force to extract the juice of the lemon by squeezing it. As a result, the shape of the lemon gets changed.
To take out paste from the toothpaste tube, we use our muscular force. This muscular force acting on the toothpaste tube leads to a change in its shape.
Here, the suspended load exerts a force on the spring and pushes the spring downwards. As a result, the spring gets stretched. Hence, its shape gets changed.
The feet of the athlete exert muscular force on the ground, which pushes the ground. This allows them to jump over the bar. As a result, their state of motion gets changed.
A blacksmith uses their muscular force while hammering a hot piece of iron. The muscular force changes the shape of the iron so that it can be given the desired shape.
When an inflated balloon is rubbed with a piece of synthetic cloth, it becomes charged. A charged body attracts an uncharged body. When this charged balloon is pressed against a wall, it sticks to the wall. Thus, the electrostatic force acts between the charged balloon and the wall.
For holding the bucket of water above the ground, we use muscular force. This muscular force acts against the force of gravity that pulls the bucket towards the ground. The two forces are equal in magnitude but opposite in direction. Therefore, the net force on the bucket is zero. Hence, there is no change in the state of motion.
The force of gravity pulls the rocket towards the ground, and the force of friction due to the earth’s atmosphere opposes its motion.
Due to the atmospheric pressure, there is a rise of water in the dropper. When all the air escapes from the nozzle, the atmospheric pressure, which is acting on the water, forces the water to fill up the nozzle of the dropper.
Excercise Solutions sreducators.com
When an inflated balloon is pressed against a wall after being rubbed with a synthetic cloth, the balloon becomes charged. This charged balloon attracts uncharged air molecules from the wall, causing the air to move and form bubbles on the balloon's surface.
The pressure in a fluid increases with depth. The deeper you go within a fluid, the more layers of fluid are above you, causing more weight and pressure from the fluid above to push down on you.
Objects float or sink in water based on their density. An object with a higher density than water will sink, while an object with a lower density will float. The buoyant force acting on an object determines whether it sinks or floats.
An umbrella protects us from rain by providing a barrier that prevents raindrops from reaching us. The surface tension of the umbrella's fabric and its shape cause the rain to slide off the umbrella's surface rather than falling on us.