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## Physics Problems 1. **A bullet is fired and gets embedded in a block kept on a table. If the table is frictionless, then:** - (a) Potential energy gets conserved. - (b) Kinetic energy gets conserved. - (c) Momentum gets conserved. - (d) both (b) and (c) 2. **A bomber plane is mov...

## Physics Problems 1. **A bullet is fired and gets embedded in a block kept on a table. If the table is frictionless, then:** - (a) Potential energy gets conserved. - (b) Kinetic energy gets conserved. - (c) Momentum gets conserved. - (d) both (b) and (c) 2. **A bomber plane is moving horizontally with a speed of 500m/s and a bomb released from it, strikes the ground in 10 seconds. What is the angle at which it strikes the ground, if g = 10m/s²?** - (a) $sin^{-1}(\frac{1}{5})$ - (b) $tan^{-1}(\frac{1}{5})$ - (c) $tan^{-1}(5)$ - (d) $tan^{-1}(1)$ 3. **A force $F = 3i + cj + 2k$ acting on a particle causes a displacement $S = -4i + 2j + 3k$ in its own direction. If the work done is 6J, then what is the value of c?** - (a) 12 - (b) 6 - (c) 1 - (d) 0 4. **The average force necessary to stop a bullet of mass 20g and speed 250 m/s as it penetrates wood to a distance of 12cm is:** - (a) 5.2 x 10³ N - (b) 4.2 x 10³ N - (c) 3.2 x 10³ N - (d) 2.2 x 10³ N 5. **Water falls from a height of 500m. What is the rise in temperature of water at the bottom, if the whole energy remains water? The specific heat of water is 4200 J/kg°C.** - (a) 0.19°C - (b) 0.24°C - (c) 0.40°C - (d) 1.16°C 6. **A 7 μF capacitor is charged by a 50V battery. How...**