if the ball is thrown an angle of 25° relative to the ground and is

Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 3.45 m/s. Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a height 36.4 m above the street level and directly above the sidewalk, to throw them to her. Bruce throws them horizontally at a time 7.00 s after Henrietta has passed below the window, and she catches them on the run. You can ignore air resistance. With what initial speed must Bruce throw the bagels so Henrietta can catch them just before they hit the ground? Where is Henrietta when she catches the bagels?

69) A rescue helicopter is hovering over a person whose boat has sunk. One of the rescuers throws a life preserver straight down to the victim with an initial velocity of 1.40 m/s and observes that it takes 1.8 s to reach the water. (a) List the knowns in this problem. (b) How high above the water was the preserver released? Note that the downdraft of the helicopter reduces the effects of air resistance on the falling life preserver, so that an acceleration equal to that of gravity is reasonable.

A motorcycle travels 80 m [north] in 15 s. The motorcycle then turns around and travels60 m [south] in 10 s.     Refer to the information in Motorcycle to answer the following question. The displacement of the motorcycle, at the end of the 25-s interval, is

You are driving a car in +y direction in constant speed of 35 m/s. An another car with a constant speed of 38 m/s approaches your car. What is the another car's velocity relative to your car?

Christopher watches a stick float downstream in a river and notices that it moves 15 m [El in a time of 2.5 x 10' s. His friend, John, is starting on the south side of the river and is going to swim across. In still water, John knows that he can swim with a speed of 1.2 m/s, relative to the water. a) What is John's velocity relative to the shore?   b) If the river is 1.5 km wide, how long will it take John to cross the river? c) How far downstream will be land?

A ball is dropped from rest from a height h above the ground. Another ball is thrown vertically upwards from the ground at the instant the first ball is released. Determine the speed of the second ball if the two balls are to meet at a height h/3 above the ground.

A movie stunt driver on a motorcycle can fly over a wide ditch with certain angle and initial speed. However, if he speeds horizontally, will he crosses this ditch? Consider his motion as projectile, and the two sides of ditch have equal altitude. Yes, he will if his initial velocity is big enough No, theoretically he will never cross this ditch It depends on the weather condition It depends on how powerful of his motorcycle Is it 1,2,3, or 4

Particle A has m=10.0g, RA=(4.0, 0.0)m, VA-(-1.0, 2.0)m/s. Particle B has m=5.0g, R0.0, 6.0)m, VB (1.0,-1.0)m/s. A) What is the position of B relative to A? What is the velocity of B relative to A? B) What is the angle between the two relative vectors that you calculated in A)? C) What is the significance of this result? D) What is the momentum of each particle? E) What is the angular momentum of A about the origin? F) If these particles collided, what would be conserved, and under what circumstances?

A plane drops a package of emergency rations to a stranded party of explorers. The plane is traveling horizontally at 40.0 m/s at 100 m above the ground.   a) Find the time of flight in air for the package before it hits the ground. b) where the package strikes the ground relative to the spot it was dropped (the distance L). c) the velocity of the package just before it hits the ground.