If you push on a heavy box that is at rest, you must exert some force to start its motion. 5. however, once the box is in motion you need a smaller force to maintain that motion. why?

What are becquerel rays?

People suffering from schizophrenia have the inability to do which of the following things? A. Cope with depressing situations B. Discern illusions from reality C. End relationships with others D. Explain what schizophrenia is

Dillon swims 300 m south and then 300 m north. What are dillon's distance traveled and displacement?

Find the magnitude of the gravitational force (in N) between a planet with mass 6.00 ✕ 1024 kg and its moon, with mass 2.65 ✕ 1022 kg, if the average distance between their centers is 2.90 ✕ 108 m.

When a 2.60-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 2.86 cm. (a) What is the force constant of the spring? N/m (b) If the 2.60-kg object is removed, how far will the spring stretch if a 1.

How are magnetic poles and electrical charges similar? A. Their same forces repel each other, and their opposite forces attract each other. B. Their same forces attract each other, and their opposite forces repel each other. C.

As part of his meal, a workman has a cup containing a hot drink. In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, as shown in the figure. Which sources of energy loss does this action reduce? Tick two boxes.

When energy is transformed, the amount of usable energy?

If an object weighs 39.2 n on earth, what is its mass

What happens when pressure is applied to a solid.