Chapter 2, Problem 7Q

Against all laws and regulations, a child throws their teddy bear off the top of the CN Tower with a velocity of 11 m/s [53o above horizontal].  If the CN Tower is 550 m tall, and air resistance is ignored, find: The time it takes for the teddy bear to hit the ground.  The horizontal distance travelled by the teddy bear.   The velocity of the teddy bear as it strikes the ground.

Two students are on a balcony 18.6 m above the street. One student throws a ball (ball 1) vertically downward at 15.1 m/s; at the same instant, the other student throws a ball (ball 2) vertically upward at the same speed. The second ball just misses the balcony on the way down.   (a) What is the difference in the two ball's time in the air? (s)(b) What is the velocity of each ball as it strikes the ground? ball 1   magnitude                                (m/s)   direction  ---Select--- upward downward ball 2 magnitude                              (m/s)   direction  ---Select--- upward downward (c) How far apart are the balls 0.900 s after they are thrown?        (m)

I'm not sure how to solve this! I tried and got 1.3 / 2.4 seconds. Am i right? Could you explain how to do it if i'm not? Cheers !   In a classic Seinfeld episode, Jerry tosses a loaf of bread (a marble rye) straight upward to his friend George who is leaning out of a third-story window. If the loaf of bread leaves Jerry's hand at a height of 1 m with an initial velocity of 18 m/sec, write an equation for the vertical position of the bread s (in meters) t seconds after release. How long will it take the bread to reach George if he catches the bread on the way up at a height of 16 m? Round to the nearest tenth of a second.

Imagine an archer preparing to fire an arrow. The archer aims the arrow directly ahead, that is to say, parallel with the ground. Bows are drawn to the corner of the mouth when fired. Let's say, for this particular archer, that puts the arrow 1.8 m (about 5.5 feet) above the ground. Assume that we have measured the initial speed of arrows fired by this archer with this bow and it is 100 m/s. (Ignore wind resistance) a) At what point during the arrow's flight will it be moving the fastest? (Be careful here, think about it. You don't need to do any calculations to figure this out.) b) How long will it take for the arrow to hit the ground?c) How far will the arrow travel during this time period?

A Canon launches a target at 40°. My distance of the x value is 4.60m. My distance for the y value is 1.1670 meters. The distance total is 4.746 meters. The problem is asking me to figure out the time of the object in air.I don't have velocity, I know the velocity initial is more than 0 and that the velocity final is zero. If I want to find time, I would need to use a vector diagram of velocity and use the resultant as my velocity. However, I have no idea what the velocity of Y or velocity of X. I only know that the velocity of X is in equilibrium and is constant as well as knowing that velocity final is zero. Oh yeah also velocity initial is velocity of the x value.

In the problem below, can you tell me what is asked, and also solve for it. A rescue helicopter wants to drop a package of supplies to isolated mountain climbers on a rocky ridge 200 m below. If the helicopter is traveling horizontally with a speed of 70 m/s (250 km/h). a) Suppose, instead, that the helicopter releases the package a horizontal distance of 400 m in advance of the mountain climbers. What vertical velocity should the package be given (up or down) so that it arrives precisely at the climbers' position?

In a friendly game of handball, you hit the ball at ground level and send it towards the wall with a speed of 18 m/s at an angle of 40o above the horizontal. (a) If the wall is 3.8 m away how high is the ball when it hits the wall? (b) What are the x and y velocity components just before it strikes the wall? (c) What is the magnitude and direction at this time?

Two students are on a balcony 19.6 m above the street. One student throws a ball vertically downward at 14.7 m/s; at the same instant, the other student throws a ball vertically upward at the same speed. The second ball just misses the balcony on the way down. What is the difference in the two balls’ time in the air? (Final answer in seconds and round off to nearest tenths place)

A long jumper (Fig. 3.11 in the book) leaves the ground at an angle of 30.0° to the horizontal and at a speed of 14.0 m/s. (a) How long does it take for him to reach maximum height? (b) What is the maximum height? (c) How far does he jump? (Assume his motion is equivalent to that of a particle, disregarding the motion of his arms and legs.) (d) Use Equation 3.9c given in the book page 63 to find the maximum height he reaches.