Hydraulic brakes used in automobiles operate on the basis of:
A. Bernoulli's Theorem
B. Pascal's Law
C. Archimedes' Principle
D. Newton's Law of Viscosity
Answer: Option B
Solution (By JKSSB Mock Tests)
Hydraulic brakes operate on Pascal's Law. It states that an external pressure applied to an enclosed, incompressible fluid is transmitted undiminished equally in all directions throughout the fluid volume. When force is applied to the small brake pedal cylinder, it exerts a large pressure that is transmitted to the larger wheel cylinders, amplifying the force.
Explanation:
Potential energy: gravitational (mgh), elastic (½kx²). Kinetic energy due to motion. Total mechanical energy sum conserved in conservative forces.
Explanation:
Seconds pendulum has time period of 2 seconds (1 s for half swing). Frequency f = 1/T = 1/2 = 0.5 Hz. Length about 99.4 cm on Earth. Not exactly 1 m.
No comments yet. Be the first to start the discussion!