Q: An object is launched horizontally off a cliff with a velocity of 14 m/s. a) How long will it be in the air for? b) How far, horizontally, will the ball move before hitting the ground?
A: The keys to this question is that horizontal velocity is constant, and initially the vertical velocity . . . → Read More: Horizontal Launch off a Cliff
Q: A tennis ball is thrown vertically upward with an initial velocity of +6.7 m/s. What will the ballâ€™s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s^2.
Its velocity will be – 6.7 m/s.
This is true for anything that is thrown vertically upwards. Look . . . → Read More: Ball thrown vertically upwards
Q: What are the kinematics equations?
Where = displacement = initial velocity = final velocity = acceleration = time
These are very useful, and you will use them many times before you are finished Physics 11. It would definitely help to memorize . . . → Read More: Kinematics Equations
Q: A rocket moves upward, starting from rest with an acceleration of 27.2 m/s2 for 3.49 s. It runs out of fuel at the end of the 3.49 s, but does not stop. How high does it rise above the ground?
A: Okay the rocket’s moving up with an acceleration of +27.2m/s^2 for a . . . → Read More: Vertical Motion of a Rocket
Some things you should know for projectiles (note that you haven’t done anything with angles yet, so you can ignore the sine and cosine parts):
The vertical and horizontal components are independent of each other. The vertical velocity is usually Vy = V*sin(Ï´) horizontal velocity is usually Vx = V*cos(Ï´), where V is the . . . → Read More: Tips to Remember for Kinematics and Projectile Questions
Q: A student standing on the top of a cliff shoots an arrow from a height of 30.0 m at 25.0 m/s and an initial angle of 32.0Â° above the horizontal. There are four parts to this question.
a) What will be the horizontal and vertical components of the arrowâ€™s initial speed?
Horizontal component . . . → Read More: An arrow is shot off a cliff at an angle, with crosswind