A 1.5 kg block is connected by a rope across a 50-cm-diameter, 2.0 kg , pulley that spins on a frictionless axle, as shown in (Figure 1). A constant 10 N tension is applied to the other end of the rope. Starting from rest, how long does it take the block to move 30 cm ?

Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses that are 1 m apart

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

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