NEET Physics — Laws of Motion

A $70 \, \text{kg}$ man in a lift accelerating downward at $1.2 \, \text{m/s}^2$ stands on a scale. What is the reading? (Take $g = 10 \, \text{m/s}^2$)

A particle of mass $1 \, \text{kg}$ moves with a velocity described by $y = 2t + 5t^2$. What is the force acting on it at $t = 2 \, \text{s}$? (Take $g = 10 \, \text{m/s}^2$)

A $8 \, \text{kg}$ mass and a $12 \, \text{kg}$ mass are connected over a pulley. A $20 \, \text{N}$ force pulls the $8 \, \text{kg}$ mass upward. What is the acceleration? (Take $g = 10 \, \text{m/s}^2$)

A $0.8 \, \text{kg}$ stone in a vertical circle of radius $2 \, \text{m}$ has a speed of $12 \, \text{m/s}$ at the bottom. What is the tension at the top? (Take $g = 10 \, \text{m/s}^2$)

A $9.2 \, \text{kg}$ block on a horizontal surface ($\mu_k = 0.2$) is pulled by a $7.2 \, \text{kg}$ mass over a pulley. A $20 \, \text{N}$ force opposes the $9.2 \, \text{kg}$ block. What is the tension? (Take $g = 10 \, \text{m/s}^2$)