A rookie quarterback throws a football with an initial upward velocity component of 12 m/s and a horizontal velocity component of 20 m/s. Ignore air resistance. (a) How much time is required for the football to reach the highest point of the trajectory? (b) How high is this point? (c) How much time (after it is thrown) is required for the football to return to its original level? How does this compare with the time calculated in part (a)? (d) How far has the football travelled horizontally during this time?

A rookie quarterback throws a football with an initial upward velocity component of 12 m/s and a horizontal velocity component of 20 m/s. Ignore air resistance. (a) How much time is required for the football to reach the highest point of the trajectory? (b) How high is this point? (c) How much time (after it is thrown) is required for the football to return to its original level? How does this compare with the time calculated in part (a)? (d) How far has the football travelled horizontally during this time?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

1. A tennis ball was dropped from point A to point B. The distance between A and B is 10 m the coefficient of restitution is 0.8. If the point B is located on a plane sloped at 30 degrees with the horizontal what will be the direction of travel of the tennis ball and how high from point B will it rise.
A projectile is launched from a cliff 100 meters above level ground with a launch velocity of 20 m/s and a launch angle of 20° above the horizontal. a.) What is the projectile's horizontal displacement upon impact? b.) What is the projectile's peak height? c.) What is the velocity at 2 seconds after launch?
4. An iPhone is thrown vertically upward and returns to earth in 10 sec. How high did go (in m) and what was the initial velocity (in m/s)?
Q.10. To predict the drag on an aircraft at a flight speed of 150 m/s, where the condition of air is such that the local speed of sound is 310 m/s, a pressurized low temperature tunnel is used. Density, viscosity and local sonic velocity at tunnel condition are 7.5 kg/m³, 1.22 x 10-5 Ns/m² and 290 m/s. Determine the flow velocity and the scale of the model. Assume full dynamic similarity should be maintained. Density and viscosity at the operating conditions are 1.2 kg/m³ and 1.8 x 105 Ns/m². 2
A small projectile is fired vertically downward into a fluid medium with an initial velocity of 60 m/s. Due to the drag resistance of the fluid, the projectile experiences a deceleration of a = (-0.4v³) m/s², where v is in m/s. Determine the projectile's velocity and position 4 seconds after it is fired.
A projectile is launched with an initial speed of 235 m/s at an angle of 62° with respect to the horizontal. Compute the range R as measured up the incline. B 235 m/s 62 A 22° Answer: R =
Consider (Figure 1) Figure 60° 20 ft < 1 of 1 ▼ Part A Determine the minimum initial velocity up at which the ball must be kicked in order for it to just cross over the 8-ft high fence. Express your answer using three significant figures and include the appropriate units. Ti μA 3 C ? v0 = Units Submit Request Answer Part B Determine the corresponding time t at which the ball reaches the fence Express your answer in degrees using three significant figures. IVE ΑΣΦ 11 vec C ? Value
A family is skating. The father (95 kg) skates at 8.2 m/s and collides and sticks to the mother (65kg), who was initially moving at 5.5 m/s and at 45° with respect to the father’s velocity. The pair then collides with their daughter (25 kg), who was stationary, and the three slides off together. What is their final velocity?
A projectile is projected with an initial velocity of 66m/s a.what is the absolute maximum horizontal range b. what is the absolute maximum horizontal height it could reqch above its starting point
PROBLEM 11.105 B A homeowner uses a snowblower to clear his driveway. Knowing that the snow is discharged at an average angle of 40° with the horizontal, determine the initial velocity vo of the snow. 40° 3.5 ft 2 ft 14 ft
2. A footballer kicks a ball on horizontal ground giving it an initial velocity of 35 m/s at an angle of 25° to the horizontal a. Where will the ball be 12 seconds after it is kicked? b What will be the greatest heightreached by the bail? c Where will the ball land?
3. A game requires that two children throw a ball upward as high as possible at the same point and then to run horizontally in opposite directions. The child who travels the greater distance before their thrown ball impacts the ground wins. One child throws the ball at his arm's height of 4 feet at a speed of 70 ft/sec and runs leftward at a speed of 16 ft/sec. The other child does the same but was able to throw better releasing his ball at a height of 6 feet at a speed of 64 feet second then runs rightw ard immediately at a speed of 17.8 ft/sec. Which child w ins the game?