You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors or windows. You decide to do some experiments to find out more about your strange situation. Your own body mass is 79.5 kg. You pick up an object and drop it from rest, starting at a height of 1.62 meters above the floor, and it hits the floor 0.345 seconds later. You can ignore air resistance. Based on the outcome of this experiment, when you step on the scale provided for you, what weight will it register for your body?

You wake up one morning to find yourself in a strange room with opaque walls, and no visible doors or windows. You decide to do some experiments to find out more about your strange situation. Your own body mass is 69.6 kg. You pick up an object and drop it from rest, starting at a height of 1.47 meters above the floor, and it hits the floor 0.164 seconds later. You can ignore air resistance. Based on the outcome of this experiment, when you step on the scale provided for you, what weight will it register for your body?   A 7,608 N   B 682.8 N   C 3,804 N   D 5,072 N

Airplane flight recorders must be able to survive catastrophic crashes. Therefore, they are typically encased in crash-resistant steel or titanium boxes that are subjected to rigorous testing. One of the tests is an impact shock test, in which the box must survive being thrown at high speeds against a barrier. A 43-kg box is thrown at a speed of 340 m/s and is brought to a halt in a collision that lasts for a time of 6.6 ms. What is the magnitude of the average net force that acts on the box during the collision?

Because the weather is sunny, Dr. Shaw has allowed you to do your next lab experiment outside, instead of staying indoors. And, since it is summer, rather than dropping weights, she is allowing you to drop water balloons, but only if you promise to clean up the balloon fragments when you are done. For one data trial, you release a water balloon of mass 283 g from the top of a Stanley Hall onto the sidewalk below. If the balloon is traveling at 11.22 m/s when it strikes your lab partner's head (1.44 m above the sidewalk) how tall is Stanley Hall? Your Answer: Answer

An investigation of an automobile crash suggests that vehicle A was moving at 52 mph toward the south and vehicle B was moving at an unknown speed toward the north, when the two cars collided, sticking together after the collision. Vehicle A weighs 1350 lbs., and vehicle B weighs 1893 lbs. If the cars did not move significantly after their collision, find the initial speed of vehicle B in mph. Answer: mph (miles per hour)

A rock of mass m falls from the top of a cliff and it experiences a significant amount of air drag as it falls. The rock has a mass of 3.6 kg and the cliff is 55 m tall. If it is going 22 m/s when it hits the ground, what was the average force of air resistance? Express your answer to two significant figures and include the appropriate units.

A 13 g bullet pierces a sand bag 32 cm thick. If the initial velocity of the bullet was 68 m/s and it emerged from the sandbag with 18 m/s what is the average magnitude of the frictional force the bullet experienced while it travelled through the sand bag? 28 N 0.87 N 87 N 8.7 N

A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 740 N on him. The mass of the losing player plus equipment is 88 kg, and he is accelerating at 1.8 m/s2 backward. Randomized Variables: f = 740 Nm1 = 88 kgm2 = 118 kga = 1.8 m/s2                                                        1. What is the magnitude of the force of friction, in newtons, between the losing player's feet and the grass as he slides backwards? F1 =                           2. What is the magnitude of the force, in newtons, that the winning player exerts on the ground to move forward if his mass plus equipment is 118 kg? Assume the second player has the same acceleration as the first. F2=

An object with a mass of 1.74 kg is initially at rest upon a horizontal, frictionless surface. An applied force of 4.11 N i acts on the object for 2.64 s. What is the object's final speed? Enter a number rounded to 2 decimal places and assume the answer has proper SI Units.

A child riding a bicycle has a total mass of 30.6 kg. The child approaches the top of a hill that is 27.9 m high 27.9 and is 86.8 m (ℓ)  long at 12.1 m/s. If the force of friction between the bicycle and the hill is 26.7 N, what is the child's velocity at the bottom of the hill? (Disregard air resistance, g = 9.8 m/s2.)