Problem 1:
You are walking a dog on a leash when a squirrel runs by. Suddenly, the two of you are accelerating forward. If the dog is exerting a 50 newton force forward on you, the force that you are exerting on the dog is
Problem 2:
A cat accidently tumbles off the deck in your backyard. As the cat falls, she flexes her body instinctively and manages to land on her feet. She is unharmed. During the time that the cat is not touching the ground and neglecting any effects due to the air, the one aspect of her motion that is constant is her
Problem 3:
You're late for a bowling tournament. The traffic light turns green and you stomp on the accelerator. Your bowling ball, which had been resting motionless on the floor beside you, suddenly rolls toward the back of your Porsche. What is causing the ball to move toward the back of car?
Problem 4:
You are competing in an archery contest and have just released an arrow toward the target. Neglect any effects due to the air. Once the arrow has left the bow and is heading forward toward the target, it experiences
Problem 5:
You are playing basketball. Occasionally the basketball rolls all the way around the inside of the basket and then rolls out the top. The conserved quantity that it was unable to get rid of and that causes it to pop out of the basket is
Problem 6:
Your luxury apartment has a dining room table that is so enormous, it has a "lazy Susan" in the middle. This large circular platform rotates frictionlessly so that you can "pass" the marmalade jar to your guests by placing that jar on the platform and then rotating the platform. When you replace the empty jar with a full jar from the pantry, the full jar
Problem 7:
When a bicycle wheel is experiencing zero net torque, that wheel
Problem 8:
As you sit in your chair, the amount of momentum you are transferring to the chair each second is equal to
Problem 9:
A lazy skateboarder is holding on to a bicyclist as the bicyclist pedals furiously. The pair is traveling up a smooth hill in a straight line path at a constant speed. The net force experienced by the skateboarder
Problem 10:
You are onstage to accept your second Oscar and you are so excited that you toss the little statue into the air. The audience gasps. After that statue leaves your hand, it experiences
Problem 11:
You make a sharp right turn in your new Ferrari and the bobble-head doll on your dashboard flies out the left side window. The doll's abrupt departure was caused by
Problem 12:
You and your friend carry identical water bottles from the first floor to the fifth floor. Your friend uses the stairs while you climb straight up the fire escape ladder. Which of you did the most work on your water bottle?
Problem 13:
You are riding a department store escalator from the first floor to the second floor. You are midway between floors and traveling uphill at constant velocity. The force that the escalator exerts on you points
Problem 14:
The only job you can find after graduation is with the music industry. No you're not the next Lady Gaga; you're simply looking for illegal downloaders. The good news is that you and your team get to use a battering ram to break down doors. You must design a 50-kilogram battering ram that exerts the largest possible force when it impacts the door and it must also transfer the largest possible momentum to the door. The part of the ram that hits door should be
Problem 15:
You are dragging an old carpet across the floor in a straight line at a steady speed. Which of the following statements about the forces acting on the carpet is correct?
Problem 16:
You are holding a heavy bag of groceries in your hand as you bicycle at constant velocity along a horizontal road. While you hold up the bag, you are doing
Problem 17:
In a famous ice skating trick, a skater begins spinning with her arms out and then pulls her arms tightly against her body. She is then spinning extremely fast on the tip of one skate. Her angular velocity increases because her angular momentum
Problem 18:
You are playing dodge ball and there are two identical balls heading toward you at once. One is traveling at 10 km/h and the other at 100 km/h. The faster ball is carrying
Problem 19:
You're filming a movie and you arrange for two unoccupied cars to drive horizontally off a tall cliff side-by-side at the same velocity. The Mercedes sedan weighs twice as much as the Mini Cooper. In this situation, the two cars hit the level ground below the cliff
Problem 20:
You are playing horseshoes and you have thrown your horseshoe toward the scoring pin. The horseshoe is traveling in an arc without touching anything and is now exactly midway between you and the pin. Neglecting any effects due to the air, the net force on the horseshoe at this moment
Problem 21:
A pole vaulter will bounce higher when he lands on a lively foam pad than when he lands on a concrete walkway. That's because
Problem 22:
You're at the lake and watch two children jump off a dock at the same time. They both kick equally hard during their jumps, but one child jumps mostly upward while the other child jumps mostly forward. After they leave the dock,
Problem 23:
You have a midnight craving for ice cream and are walking quickly through your pitch-black apartment when you collide with the wall. You come to a complete stop. Fortunately, your roommate has mounted a thick woolen tapestry (wall-hanging) on the cement wall and that soft tapestry saves you from injury. When you came to a stop on the tapestry-covered wall, you transferred
Problem 24:
To win a stuffed animal at the state fair, you simply need to drop a glass marble onto a stationary glass plate and have the marble come to rest on that plate. Unfortunately, when the marble hits the plate, it bounces upward because the marble
Problem 25:
To see what it's like to bungee jump, you attach a huge rubber band to the roof of your porch and hold on to the other end of the band as you jump off the porch. Not surprisingly, the band stretches to its limit and then snaps. Breaking that rubber band required energy and that energy was provided by
Problem 26:
Your laptop falls off the shelf onto your bed and bounces up and down before settling motionless at equilibrium on the mattress. Fortunately, it's undamaged and you can still spend all your time on Facebook. When during the laptop's descent does it first stop accelerating downward?
Problem 27:
You jump while standing on a bathroom scale and the scale briefly reads more than your actual weight. During that moment, the scale is exerting an upward force on you that is
Problem 28:
You drop a baseball from the top of a tall building and it hits the ground 4 seconds later. When the baseball has fallen for only 2 seconds, how far is it above the ground? [Note: neglect any effects due to the air.]
Problem 29:
A wind turbine is turning at constant angular velocity and generating electric power. Compared to the torque that the wind is exerting on that turbine to the torque the generator is exerting on that turbine. [Note: neglect friction or any other nuisance effects.]
Problem 30:
You are kneading a large portion of bread dough with your hands. You push the top of the dough away from you as it squishes away from you and you pull the top of the dough toward you as it squishes toward you. You are transferring energy to the bread dough