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- 1110. In Fig. P-1109, a ball thrown down the incline strikes it at a distance s 254.5 It. If the ball rises to a maximum height h 64.4 ft above the point of release, compute its initial velocity vo and inclination 6. Ans. v. = 80.5 ft per see; 0= 53.1° FIG. P-1109 and P-1110.42) A man wants to cross a SOD m wide. His rowing speed (relative to river 3000 m/h. The river flows with a of the water ) is the man's ualking peed Aowing & walking) he should take to get the point disctly opposite his star ting point in the shortest time ? b). How long does it take?" speed on shore is 5000 m/h. a). find the path (combined 2000 m/h. IfYou shoot an arrow into the air. Two seconds later (2.00 s) thearrow has gone straight upward to a height of 30.0 m above itslaunch point. (a) What was the arrow’s initial speed? (b) Howmuch time did it take for the arrow to first reach a height of 15.0 mabove its launch point?
- In the 1968 Olympics in Mexico City, Bob Beamon shattered the record forthe long jump with a jump of 8.90 m. His speed on takeoff was 9.5 m/s.How close did this athlete come to the maximum possible range in theabsence of air resistance?A kangaroo can jump over an object 2.50 m high. (a) Considering just its vertical motion, calculate its vertical speed when it leaves the ground. (b) How long a time is it in the air?On planet Arcon, the maximum horizontal range of a projectile launched at 10 m/s is 20 m. What is the acceleration of gravity on this planet?
- A seagull can fly at a velocity of 9.00 m/s in still air. (a) If it takes the bird 20.0 mm to travel 6.00 kin straight into an oncoming wind, what is the velocity of the wind? (b) If the bird turns around and flies with the wind, how long will it take the bird to return 6.00 km?Ih took Joseph 30 minutes longer to drive 375 km from along the north shore of a river from Apex to Rounder than it took to return along the south shore, a distance of 420 km. On the retum trip the highway was wider and in better condiftion, so he was able to average 10 km/h faster. What was his average speed on cach part of the trip?A football is hit at an angle of 40.0 degrees with the horizontal with a velocity of 130.0 ft/s. find: a) the time it reached the maximum height? b) Max. ht. the ball had reached? c) the total time travel?
- A person tosses a ball for her puppy to retrieve. The ball leaves herhand horizontally with a speed of 4.6 m>s. If the initial height ofthe ball is 0.95 m above the ground, how far does it travel in thehorizontal direction before landing?Question 4: A particle is thrown into air with initial speed vo making angle 0 with the horizontal as shown in Figure 1. The gravitational acceleration g and a constant acceleration a, due to a wind act on the particle. Find the range of the motion. a, 'w Figure 1 100A juggler throws a ball straight up into the air. If the ball returnsto its original position in the juggler’s hand in 0.98 s, what was itsmaximum height above the juggler’s hand?