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3 cards from this section. Quick, good the night before a test.
What happens to the forces acting on a ball at rest?
Think about what happens when you throw a ball.
What is static friction's role in motion?
Consider your experience pushing heavy objects.
True or False: Force always acts in the direction of motion.
Think about forces acting on objects even when they don't move.
What type of friction keeps an object stationary until a force is applied?
Consider pushing heavy objects that won’t move at first.
A 5 kg block of wood is on a flat surface. The static friction coefficient is 0.4. What is the maximum force required to move the block?
Remember, static friction adjusts up to its limit according to the coefficient.
A car moves in a circle of radius 50 m at a speed of 20 m/s. Calculate the required centripetal force for a 1000 kg car.
Centripetal force is often misunderstood; it's not a unique force, but results from existing ones.
6 more questions in this section. Enroll free to practise them all.
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