A 3.00 kg ball is dropped from rest from the roof of a building 176.4 m high. While the ball is falling, a horizontal wind exerts a constant force of 12.0 N on the ball. How far from the building does the ball hit the ground?

A student pulls a rope attached to a 10.0 kg wooden sled and moves the sled across dry snow. The student pulls with a force of 15.0 N at an angle of $45.0^{\circ}$. If $\mu_{k}$ between the sled and the snow is 0.040, what is the sled’s acceleration? Show your work.

You sit in the middle of a large, freely rotating turntable at an amusement park. If you crawled toward the outer rim, would the rotation speed increase, decrease, or remain unchanged? What law of physics supports your answer?

You sit at the middle of a large turntable at an amusement park as it is set spinning and then allowed to spin freely. When you crawl toward the edge of the turntable, does the rate of the rotation increase, decrease, or remain unchanged? What physics principle supports your answer ?

A 1000 kg car traveling at a speed of 40 m/s skids to a halt on wet concrete where $\mu _ { \mathrm { k } } = 0.60$. How long are the skid marks?

An astronaut lands on a planet that has the same mass as Earth but twice the diameter. How does the astronaut's weight differ from that on Earth?

An astronaut lands on a planet that has twice the mass as Earth and twice the diameter. How does the astronaut's weight differ from that on Earth?

Two lifeguards pull on ropes attached to a raft. If they pull in the same direction, the raft experiences a net force of 334 N to the right. If they pull in opposite directions, the raft experiences a net force of 106 N to the left. Find the force exerted by each lifeguard on the raft for each situation. (Disregard any other forces acting on the raft.)

A brick of mass 1.0 kg slides down an icy roof inclined at

$$30.0 ^ { \circ }$$

with respect to the horizontal. (a) If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 2.00 m away? Ignore friction. (b) Redo part (a) if the coefficient of kinetic friction is 0.10.

A 0.150 kg baseball is thrown upward with an initial speed of 20.0 m/s. What is the force on the ball when it reaches half of its maximum height? (Disregard air resistance.)

The force exerted by the wind on the sails of a sailboat is 390 N north. The water exerts a force of 180 N east. If the boat (including its crew) has a mass of 270 kg, what are the magnitude and direction of its acceleration?

A ball is thrown straight upward and returns to the thrower’s hand after 3.00 s in the air. A second ball thrown at an angle of $30.0 ^ { \circ }$ with the horizontal reaches the same maximum height as the first ball. (a) At what speed was the first ball thrown? (b) At what speed was the second ball thrown?

A rope attached to a $20 \mathrm{~kg}$ wood sled pulls the sled up a $20^{\circ}$ snow-covered hill. A $10 \mathrm{~kg}$ wood box rides on top of the sled. If the tension in the rope steadily increases, at what value of the tension does the box slip?

A snowmobile travels in a straight line. The snowmobile’s initial velocity is +3.0 m/s. If the snowmobile accelerates at a rate of +0.50 $\mathrm{m} / \mathrm{s}^{2}$ for 7.0 s, what is its final velocity?