Railway tracks are banked on curves so that the required centripetal force can be obtained from the horizontal component of the train’s weight. This helps to prevent derailment by ensuring that the train remains securely on the tracks, balancing the ...
Tiwari Academy Discussion Latest Questions
The use of hydraulic brakes in automatic vehicles is a direct application of Pascal’s law. Pascal’s law states that pressure exerted at any point in a confined fluid is transmitted undiminished throughout the fluid in all directions, enabling the effective ...
The rule that validates the statement that matter can neither be created nor destroyed is the law of conservation of mass. This principle states that the total mass of a closed system remains constant over time, regardless of any physical ...
More energy is spent in climbing stairs because the person works against gravity. When climbing stairs, the person must lift their body mass upward, opposing the force of gravity. This requires expending energy to overcome gravity’s resistance, making the task ...
When the speed of a moving object doubles, its kinetic energy quadruples. Kinetic energy is directly proportional to the square of the velocity according to the kinetic energy formula. Therefore, when the speed doubles, the kinetic energy increases by a ...
The drawn bow does not have kinetic energy. Kinetic energy is the energy possessed by an object due to its motion. While the other options involve objects in motion—fired bullet, flowing water, and moving hammer—the drawn bow is not in ...
Ice floats in water, but sinks in alcohol because ice is lighter than water and heavier than alcohol. This buoyancy phenomenon occurs due to differences in density. Ice has a lower density than water but a higher density than alcohol.
Approximately 1/10 part of an iceberg floating in the sea remains above the surface of the sea. This is due to the difference in densities between ice and seawater, where the density of ice is about 90% that of seawater, ...
The reason for the floating of clouds in the atmosphere is density. Clouds consist of tiny water droplets or ice crystals that are less dense than the surrounding air. This lower density causes the clouds to float or remain suspended ...
A swimmer finds it easier to swim in seawater than in a river because the density of seawater is higher than that of ordinary water. The higher density provides more buoyant force, which helps the swimmer to float and swim ...