physics instructor assigns a student to go to the roof of the Science Building and determine the building height using a small tennis ball. The student decides to throw a ball with a speed of 20 m/s at an angle of 30° above the horizontal. The tennis ball hits the ground 3.0 s after it reaches maximum height. What is the height of the Science Building? (air resistance is negligible) a. ​49 m b. 54 m c. 26 m d. 40 m e. 24 m

student throws a heavy red ball horizontally from a balcony of a tall building with aninitial speed v0. At the same time, a second student throws a lighter blue ball horizontally fromthe same balcony with an initial speed v0 /2. Ignoring air resistance, which of the followingstatements must be true?a. The red ball hits the ground with the greater speed.b. Both balls hit the ground with the same vertical velocity component.c. Both balls hit the ground with the same angle of impactd. The balls reach the ground at the same instant.     More than one of the statements can be true.

Part A and B on paper

When there is no air resistance what best describes the vectors of a projectile in motion:   a.The acceleration vector and velocity vector are both constant magnitude.   b.The acceleration vector is constant magnitude and perpendicular to the trajectory. The velocity vector is at a tangent to the trajectory   c.The acceleration vector is constant and points straight down. The velocity vector is perpendicular to the trajectory   d.The acceleration vector is constant and points straight down. The velocity vector is at a tangent to the trajectory

. A stone is thrown from level zero at 30° above horizontal. It lands at the same level 20 m away.a. What is the initial speed of the stone?b. What is the maximum height that it reaches during the flight?c. How long does the whole flight take?

1. In a practice session, Iris hits a ball horizontally with a speed of 36 m/s from a height of 3.1 m. The ball travels until it hits the ground. a. Determine the time the ball is in the air. b. Determine the horizontal distance traveled by the ball. c. Calculate the ball’s velocity as it hits the ground.

An airplane flies horizontally at a speed of 369 km/h and drops a crate that falls to the horizontal ground below. Neglect air resistance.  A. If the altitude of the plane was 628 m, then how far, horizontally in meters, did the crate move as it fell to the ground?  B. What was the speed of the crate, in m/s, just before it hit the ground?

1. AN ARROW IS SHOT AT 33 DEGREE ANGLE WITH HORIZONTAL. IT HAS A VELOCITY OF 25M/S. a. HOW HIGH WILL IT GO? b. WHAT HORIZONTAL DISTANCE WILL IT TRAVEL? c. TOTAL TIME IN AIR d. VELOCITY VECTOR AT MAX HEIGHT e. VELOCITY WHEN IT HITS THE GROUND

I threw a rock into a quarry horizontally 30 m/s. The quarry was 80 meters deep. How far did it go horizontally? A. 144 m B. 80 m C. 40 m D. 120 m

A canoeist paddles north across a river at 3.0m/s. (The canoe is always kept pointed at right angles to the river.) The river is flowing east at 4.0 m/s and is 1.0x10^2 m wide. a. what is the velocity of the canoe relative to the riverbank? b. calculate the time required to cross the river. c. how far downstream is the landing point from the starting point?