1). A stone is dropped from rest from the top of a tall building, as Figure 2.17 indicates. After 3.00 s of freefall, what is the displacement y of the stone?  The stone, starting with zero velocity at the top of the building, is accelerated downward by gravity.

Reasoning The upward direction is chosen as the positive direction. The initial velocity v0 of the stone is zero, because the stone is dropped from rest. The acceleration due to gravity is negative, since it points downward in the negative direction.
Solution

2). After 3.00 s of freefall, what is the velocity v of the stone? Solution
1). A football game customarily begins with a coin toss to determine who kicks off. The referee tosses the coin up with an initial speed of 5.00 m/s. In the absence of air resistance, how high does the coin go above its point of release? Reasoning The coin is given an upward initial velocity. But the acceleration due to gravity points downward. Since the velocity and acceleration point in opposite directions, the coin slows down as it moves upward. Eventually, the velocity of the coin becomes v=0 m/s at the highest point.  At the start of a football game, a referee tosses a coin upward with an initial velocity of v0=+5.00 m/s. The velocity of the coin is momentarily zero when the coin reaches its maximum height. Solution
2). What is the total time the coin is in the air before returning to its release point? Reasoning During the time the coin travels upward, gravity causes its speed to decrease to zero. On the way down, however, gravity causes the coin to regain the lost speed. Thus, the time for the coin to go up is equal to the time for it to come down. In other words, the total travel time is twice the time for the upward motion. With these data, we can use Equation (v=v0+at) to find the upward travel time.
...1. Alice throws the ball to the +X direction with an initialvelocity 10m/s. Time elapsed during the motion is 5s, calculate the height that object is thrown and Vy component of the velocity after it hits the ground.
2. John kicks the ball and ball does projectile motion with an angle of 53º to horizontal. Its initialvelocity is 10 m/s, find the maximum height it can reach, horizontal displacement and total time...
...
Lab #3: InitialVelocity of a Projectile 


Abhishek Samdaria 
Pd.4 and 5 

Lab #3: InitialVelocity of a Projectile
Theory:
How can we determine the initialvelocity of a projectile?
Experimental Design:
The purpose behind this experiment was to determine the initialvelocity of a projectile. Projection motion consists of kinematics of motion in the...
...between the moment the car left the table and the moment it hit the floor?
b. What was the horizontal velocity of the car when it hit the ground?
3. A hawk in level flight above the ground drops the fish it caught. If the hawk’s horizontal speed is , how far ahead of the drop point will the fish land?
4. A pistol is fired horizontally toward a target away, but at the same height. The bullet’s velocity is . How long does it take the bullet to get to the target?...
...at a velocity of 80 km/h when he sees an old woman crossing the road 45 m away. He immediately steps hard on the brakes to get the maximum acceleration of 7.5 m/square second. how far will he go before stopping? Will he hit the old woman?
3. the time a male bungee jumper if freely falling is 1.5 seconds
(a) What is the velocity of the jumper at the end of 1.5 s?
(b) how high did he fall?
4. A juggler tosses three balls alternately vertically...
...Laboratory – Terminal Velocity
Introduction:
Consider dropping a piece paper and a brick from the same height. Although in theory they should both strike the ground at the same time; in practice the brick will always strike the ground first. The reason is because of air resistance. As the paper falls to the ground air resistance is pushing the paper up, this slows the acceleration of the paper.
It is known that as the velocity of an object increases the...
...released until it strikes
the ground.
4. The time it takes for the ball to hit the
ground depends on v0 , g and h.
004 10.0 points
The velocity of a projectile at launch has a
horizontal component vh and a vertical component vv . When the projectile is at the highest point of its trajectory, identify the vertical
and the horizontal components of its velocity
and the vertical component of its acceleration.
Consider air resistance to be negligible.
4. It...
...how is time, t related to the inclination of the track? Explain why?
Time and position of velocity are interrelated to each other and the height and gravitational pull affects the acceleration of a moving and a free falling object.
3. From the data obtained, how would you account the difference between the picket fence’s acceleration and the value of g?
The value of the slope of a graph of average velocity versus time will be the acceleration due to gravity of...
...consideration of the forces that cause the motion. There are four activities done in this experiment. Graphical analysis of human motion, where displacement vs time and velocity vs. time were graphed. Graphical analysis of motion where in the 10th seconds the total displacement is 18.75m, average velocity is 1.88m/s and instantaneous velocity is 3.76m/s. Reaction time where one of the normal reaction time among the group is 0.16s and the reaction time...