PART - 1 CH - 3 Motion in a Plane — Physics STD 11 Science — Question

Magnitude of force F experienced by a certain object moving with speed v is given by F = kv² where k is constant. Find the dimensions of K.

A box is pushed through 4.0m across a floor offering 100N resistance. How much work is done by the resisting force?

What is the distance between a compression and its nearest rarefaction in a longitudinal wave?

Consider a gas of neutrons. Do you expect it to behave much better as an ideal gas as compared to hydrogen gas at the same pressure and temperature?

Fig. depicts four x-t plots for linear motion of a particle. Which of the plots represent periodic motion? What is the period of motion (in case of periodic motion)?

A block of ice is floating in a liquid of specific gravity 1.2 contained in the beaker. What will be the effect on the level of liquid in the beaker when the whole ice melts?

Why are gas thermometers more sensitive than mercury thermometers?

Which of the following examples represent (nearly) simple harmonic motion and which represent periodic but not simple harmonic motion?
The rotation of earth about its axis.

Mark the correct options.

1. Luminous flux and radiant flux have same dimensions.
2. Luminous flux and luminous intensity have same dimensions.
3. Radiant flux and power have same dimensions.
4. Relative luminosity is a dimensionless quantity.

A steel rod of cross-sectional area 4cm² and length 2m shrinks by 0.1cm as the temperature decreases in night. If the rod is clamped at both ends during the day hours, find the tension developed in it during night hours. Young's modulus of steel = 1.9 × 10¹¹N/m².