1-7) An elevator is traveling upwards with constant acceleration aɛ = 1 m/s². A stone is dropped inside the elevator from a height of ho = 1.5 m. Which acceleration has the stone from the point of view of a person in the elevator? When will it reach the floor of the elevator?

Problem 3) A ball is dropped from a balloon which is ascending vertically at a constant velocity of 6 m/s. If the ball was released upwards with 6 m/ s as initial velocity, what would be distance between the ball and the balloon gfter 10 seconds?

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.

Bob hits a tennis ball upward with a velocity of Vo= 30 y m/s from a height of 1 meter above the ground. a) Find the velocity of the ball after 2.5 seconds (Answer: 5.5y m/s  ) b) Find the position of the ball at this time (Answer: 45.4y m ) c) Plot acceleration, velocity, and position vs time.

2. A ball is thrown so that it just clears a 25 ft wall 100 ft away. If it left the hand 5 ft above thee ground and at an angle of 60° to the horizontal, what was the initial velocity of the ball?

A ball is thrown vertically  upward fro the top of a building with an initial velocity of 20 m/s at an initial height of 50 m  above the ground.The ball just misses the roof on its way down. a) Determine the time needed for the ball to reach maximum height b) the maximum height c) the time needed for the ball to return  to the height  from which it was thrown and its velocity at that instant.

Give an example in which velocity is zero yet acceleration is not.

Professional baseball player Nolan Ryan could pitch a baseball at approximately 160.0 km/h. At that average velocity, how long did it take a ball thrown by Ryan to reach home plate, which is 18.4 m from the pitcher’s mound? Compare this with the average reaction time of a human to a visual stimulus, which is 0.25 s.

An airplane flying directly eastward at a constant speed travels 300 km in 2.0 h. (a) What is the average velocity of the plane? (b) What is its instantaneous velocity?

The Lunar Roving Vehicle used In NASA’s late Apollo missions reached an unofficial lunar land speed of 5.0 m/ s by astronaut Eugene Cernan. If the rover was moving at this speed on a flat lunar surface and hit a small bump that projected it off the surface at an angle of 20 , how long would it be “airborne” on the Moon?