A ball on an extremely low-friction, tilted surface will slide downhill without rotating. If the surface is rough, however, the ball will roll. Explain.

The temperature of the atmosphere increases with increasing altitude in the

A car drives at a constant speed of 3m/s around a circle with radius 20m. What is the centripetal acceleration of the car

By measuring the amounts of parent isotopes and daughter product in the minerals contained in a rock, and by knowing the half-life of the parent isotope, a geologist can calculate the absolute age of the rock.

Which of these is not a type of force? A. friction B. inertia C. electric D. nuclear

Which best explains why the pencil seems bent? A. It travels at the same speed in all matter. B. It travels faster in air than in water. C. It travels at different speeds in water and in glass. D. It travels slower in air than in glass.

In a inverse relationship, when one variable increases, the other

A chair of weight 75.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 42.0 N directed at an angle of 38.0 ∘ below the horizontal and the chair slides along the floor.

A car travels 20 km west, then 20 km south. what is the magnitude of its displacement? A) 0 km B) 20 km C) 28 km D) 40 km

A sport car accelerates from rest to 29 m/s in 4.4 sec. what's its acceleration?

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