Rank the microtidal forces on your own body, from greatest to least, produced by the a. Moon. b. Earth. c. Sun.

Calculate in newtons the weight of a 2000-kg elephant.

The planet (M) and its moon (m) gravitationally attract each other. Rank the forces of attraction between each pair, from greatest to least. A- M-m (distance between M and m is d) B- 2M-m (distance between 2M and m is d) C- M- 2m (distance between M and 2m is d) D- M-2m (distance between M and 2m is 2d)

What two principal factors affect the force of air resistance on a falling object?

Why doesn't a heavy object accelerate more than a light object when both are freely falling?

An object will remain at rest or move in a straight line with constant speed unless it is acted upon by a force. This is the definition of Newton's first law of ___.

Consider the light of multiple candle flames, each of the same brightness. Rank the light that enters your eye from brightest to dimmest for the following situations: a. Three candles seen from a distance of $3 \mathrm{~m}$ b. Two candles seen from a distance of $2 \mathrm{~m}$ c. One candle seen from a distance of $1 \mathrm{~m}$

In the string-pull a sharp jerk on the bottom string results in the bottom string breaking. Does this occur because of the ball's weight or its mass?

When $G$ was first measured by Henry Cavendish, newspapers of the time hailed his experiment as the "weighing Earth experiment." Why?

Calculate the torque produced by a 50-N perpendicular force at the end of a 0.2-m-long wrench.

Which will have the greater acceleration rolling down an incline – a bowling ball or a volleyball? Defend your answer.

Here’s a situation to challenge you and your friends. A rocket coasts in an elliptical orbit around Earth. To attain the greatest amount of KE for escape using a given amount of fuel, should it fire its engines at the apogee (the point at which it is farthest from Earth) or at the perigee (the point at which it is closest to Earth)? (Hint: Let the formula $\mathrm{Fd}=\Delta \mathrm{KE}$ be your guide to thinking. Suppose the thrust F is brief and of the same duration in either case. Then consider the distance d the rocket would travel during this brief burst at the apogee and at the perigee.)

The rock and meterstick balance at the $25-\mathrm{cm}$ mark, as shown in the sketch. The meterstick has a mass of $1 \mathrm{~kg}$. What must be the mass of the rock?

Calculate the force of friction that keeps an $80-\mathrm{kg}$ person sitting on the edge of a horizontal rotating platform when the person sits $2 \mathrm{~m}$ from the center of the platform and has a tangential speed of $3 \mathrm{~m} / \mathrm{s}$. Angular momentum $=m v r$