Newton's laws, friction, circular motion.
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Q1 · Laws of Motion · EASY
A 5 kg block experiences a net force of 20 N. Its acceleration is:
Q2 · Laws of Motion · MEDIUM
A 10 kg block rests on a horizontal surface with coefficient of friction μ = 0.3 (g = 10 m/s²). The minimum force needed to start the block sliding is:
Q3 · Laws of Motion · EASY
A particle moves in a circle of radius 2 m at constant speed 4 m/s. Its centripetal acceleration is:
Q4 · Laws of Motion · EASY
A 2 kg mass hangs at rest from a string (g = 10 m/s²). The tension in the string is:
Q5 · Laws of Motion · EASY
A car of mass 1000 kg moving at 20 m/s takes a turn on a level circular road of radius 100 m. The centripetal force required to keep the car moving in the circular path is: