NEET Physics — Laws of Motion

A \( 0.4 \, \text{kg} \) stone in a vertical circle of radius \( 2 \, \text{m} \) has a tension of \( 20 \, \text{N} \) at the bottom. What is the tension at the top? (Take \( g = 10 \, \text{m/s}^2 \))

A \( 60 \, \text{kg} \) man stands in a lift that accelerates downward at \( 3 \, \text{m/s}^2 \) and then jumps with an upward acceleration of \( 7 \, \text{m/s}^2 \) relative to the lift. What is the normal force during the jump? (Take \( g = 10 \, \text{m/s}^2 \))

A \( 0.5 \, \text{kg} \) stone tied to a string of length \( 1 \, \text{m} \) is whirled at \( 60 \, \text{rev/min} \). What is the maximum tension the string can withstand if it breaks at \( 50 \, \text{N} \)?

A \( 1600 \, \text{kg} \) truck accelerates at \( 3 \, \text{m/s}^2 \) for \( 3 \, \text{s} \), then a \( 1.5 \, \text{kg} \) stone is dropped. What is the horizontal distance traveled by the stone in \( 2 \, \text{s} \)? (Neglect air resistance)

A \( 10 \, \text{kg} \) mass is suspended by a rope with a \( 40 \, \text{N} \) horizontal force at its midpoint. What is the angle the rope makes with the vertical? (Take \( g = 10 \, \text{m/s}^2 \))