projectile motion of a object in motion, Exercises of Physics

Download projectile motion of a object in motion and more Exercises Physics in PDF only on Docsity! Name: _________________________________________ Date: _______________ Pd: ____________ Projectile Problems Page 2 of 3 6.1 A boy runs at a speed of 3.3 meters per second straight off the end of a diving board that is 3 meters above the water. How long is he airborne before he hits the water? What is the horizontal distance he travels while airborne? a. What do you know? speed and height b. What do you need to solve for? time and horizontal distance c. What equations will you use? What is the solution to this problem? Solve the following problems. Show your work. 1. A cat runs and jumps from one roof top to another which is 5 meters away and 3 meters below. Calculate the minimum horizontal speed with which the cat must jump off the first roof in order to make it to the other. a. What do you know? b. What do you need to solve for? c. What equation(s) will you use? d. What is the solution to this problem? 2. An object is thrown off a cliff with a horizontal speed of 10 m/sec. After 3 seconds the object hits the ground. Find the height of the cliff and the total horizontal distance traveled by the object. a. What do you know? b. What do you need to solve for? c. What equation(s) will you use? d. What is the solution to this problem? time: horizontal distance: dy 4.9t2= dx vxt= 2 2 3.0 meters 4.9 0.61 0.61 0.78 sec t t t t 3.3 m/sec 0.78 sec 2.6 meters x x d d u Page 3 of 3 6.13. If a marble is released from a height of 10 meters how long would it take for it to hit the ground? a. What do you know? b. What do you need to solve for? c. What equation(s) will you use? d. What is the solution to this problem? 4. A ski jumper competing for an Olympic gold medal wants to jump a horizontal distance of 135 meters. The takeoff point of the ski jump is at a height of 25 meters. With what horizontal speed must he leave the jump? a. What do you know? b. What do you need to solve for? c. What equation(s) will you use? d. What is the solution to this problem? 5. A motorcycle stunt driver zooms off the end of a cliff at a speed of 30 meters per second. If he lands after 0.75 seconds, what is the height of the cliff? a. What do you know? b. What do you need to solve for? c. What equation(s) will you use? d. What is the solution to this problem? 6. A marble rolling at a speed of 2 meters per second falls off the end of a 1-meter high table. How long will the marble be in the air? a. What do you know? b. What do you need to solve for? c. What equation(s) will you use? d. What is the solution to this problem? 7. Challenge! A marshmallow is dropped from a 5-meter high pedestrian bridge and 0.83 seconds later, it lands right on the head of an unsuspecting person walking underneath. How tall is the person with the marshmallow on his head? a. What do you know? b. What do you need to solve for? c. What equation(s) will you use? d. What is the solution to this problem? Horizontal distance Vertical velocity v = Δx a = vf - vi Δt Δt Vertical displacement Δx = 1/2 a t2