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- Choose the BEST answer to the following: If you travel at high speed, then compared with your friends who “stay at home,” you are (a) older. (b) younger. (c) no younger nor no older. (d) longer.A private jet can fly 1780.8 miles against a 23-mph headwind in the same amount of time it can fly 2167.2 miles with a 23-mph tailwind. Find the speed of the jet.What is the relationship of speed, time, distance and acceleration to motion?
- What is the difference between acceleration, velocity, and speed?A stunt coordinator is designing a boat chase where two boats drive towards each other at a high speed. On camera it will look like they will crash, but they will safely miss each other. At the moment they meet, an explosion will be set off so that it appears as if they burst into a ball of fire putting the survival of our Adventuresome Hero is doubt. The stunt coordinator needs to know precisely when and where the boats will pass so that everything appears on screen as written in the script. Our Adventuresome Hero is in a boat moving at 12 m/s, his Worthy Adversary races towards him in a boat traveling at 17 m/s. Initially, the boats are separated by 97 m of open water. Lights! Camera! Action! They race towards each other... The two boats will pass each other after -------seconds have elapsed. Our Adventuresome Hero will travel --------meters before they meet. His Worthy Adversary will travel-------- meters before they meet.How does the velocity of an object affect the air resistance that the object experiences?
- What type of projectile motion is a compression spring ping pong ball launcher launching off the groundA skydiver jumps from a helicopter hovering at high altitude. Neglecting air resistance, how fast would he be falling 7 seconds after jumping.A monkey hanging from a tree branch sees a hunter aiming a rifle directly at him. The monkey then sees a flash and knows that the rifle has been fired. Reacting quickly, the monkey lets go of the branch and drops so that the bullet can pass harmlessly over his head. Does this act save the monkey’s life? Why or why not? (Hint: Consider the similarities between this situation and that of Exercise 24.11.)
- An astronomy textbook is to be dropped from a tall building on Earth. One second after dropped, what are the textbook’s speed, velocity, and acceleration? After 2 seconds? After 3 seconds? The book hits the ground; what are the book’s speed, velocity, and acceleration?An astronaut working in space near the International Space Station says she feels weightless. What does she mean? Does the astronaut not have weight?As is driving towards a tree it is struck by lightening at the exact same time that a tree behind him is struck by lightening . Both trees are an equal distance from his car when the lightening strikes. What would be his perception of the time of the lightening strikes ? Choose from the answers below: