Motion in a Straight Line — Physics STD 11 Science — Question

Explain why
A drop of liquid under no external forces is always spherical in shape.

Each side of a cube is 7.203m. Calculate the surface area and volume of the cube upto correct number of significant figure.

Is it possible to place a satellite, so that it is always over New Delhi? Why?

A simple pendulum of a length l and having a bob of mass M is suspended in a car. The car is moving on a circular track of radius R with a uniform speed v. If the pendulum makes small oscillations in a radial direction about its equilibrium position, what will be its time period?

Explain the reason for change of path of a ball in spinning motion.

If the density of a gas is kept constant but the root mean square velocity of the gas molecules is doubled, then how many times will the pressure of the gas increase?

A barometer is constructed with its tube having radius 1.0mm. Assume that the surface of mercury in the tube is spherical in shape. If the atmospheric pressure is equal to 76cm of mercury, what will be the height raised in the barometer tube. The contact angle of mercury with glass = 135^º and surface tension of mercury = 0.465N/m. Density of mercury = 13600kg/m³.

Give any two examples to explain Newton's third law.

The time of flight of projectile is related to its horizontal range as gT2 = 2R. Find the value of its angle of projection

The maximum acceleration of a simple harmonic oscillator is a₀ and the maximum velocity is v₀. What is the displacement amplitude?