Ask Question
PhysicsPhysics
5 May, 09:30

The crossbar of a goal post on a professional American football field sits at a height of 3.05 meters (10 feet) above the field. A football is placed on the ground at midfield so that it is 54.9 meters (60 yards) horizontally from the position of the crossbar. The ball is then kicked so that its initial velocity is 26.0 m/s (58.2 mph) at an angle of 35 degrees above the horizontal. Neglecting air friction, does the ball make it over the goal post and by how much?

A. Yes, the ball passes 2.83 meters above the crossbar

B. No, the ball passes 1.57 meters below the crossbar

C. No, the ball hits the ground before it reaches the crossbar

D No, the ball hits the crossbar

E. Yes, the ball passes 8.22 meters above the crossbar

+5
Answers (1)
  1. 5 May, 13:20
    0
    A. Yes, the ball passes 2.83 meters above the crossbar

    Explanation:

    This problem relates to projectile motion.

    Horizontal component of velocity of ball = 26 cos 35 = 21.3 m / s

    Vertical component of velocity = 26 sin35 = 14.9 m / s

    Time to cover horizontal distance of goal post that is 54.9 m

    = distance / horizontal speed

    = 54.9 / 21.3

    = 2.577 s.

    vertical distance covered in this time

    h = ut - 1/2 gt², u is vertical component of velocity, t = 2.577 s

    h = 14.9 x 2.577 -.5 x 9.8 x 2.577²

    = 38.39 - 32.54

    = 5.85 m

    So the ball crosses the crossbar above it by 5.85 - 3.05 = 2.8 m
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “The crossbar of a goal post on a professional American football field sits at a height of 3.05 meters (10 feet) above the field. A football ...” in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
If a car travels at 65mph for 2.25 hours, how far does it go in miles?
Answers (1)
Which of the following accurately shows how to calculate the weight of a 20 kg object? A) 20 Kg x 9.8m/s2 B) 20 Kg / mass of the earth C) 20 kg/9.8 m/s2 D) 20 kg x mass of the earth
Answers (1)
As a rocket moves farther and farther upward from the launch pad, what happens to the strength of Earth's gravitational field around the rocket? a. It gets weaker. b. It grows stronger. c. It remains constant.
Answers (2)
A student analyzes data of the motion of a planet as it orbits a star that is in deep space. The orbit of the planet is considered to be stable and does not change over time.
Answers (2)
Summarize the law of superposition
Answers (1)
New Questions in Physics
Which of the following best describes each particle? A. Protons are negative, neutrons are neutral, and electrons are positive. B. Protons are neutral, neutrons are positive, and electrons are negative. C.
Answers (1)
During World War II, both the Allied and Axis powers used propaganda to A. weaken public support for the war. B. downplay public opinion. C. manipulate the public through the use of humor. D. shape public support of the war
Answers (1)
What type of simple machine is a hand drill? A) pulley B) wedge C) ramp D) screw
Answers (2)
Calculate the wavelength and frequency of the radiation emitted by the electronic transition from the 10th to the 9th excited state of hydrogen.
Answers (1)
An unknown fluid has a specific gravity of 0.750. What is the volume of 22.5 kg of this fluid? A. 10 L B. 20 L C. 30 L D. 40 L
Answers (1)
Home » Physics » The crossbar of a goal post on a professional American football field sits at a height of 3.05 meters (10 feet) above the field. A football is placed on the ground at midfield so that it is 54.
Sign Up Forgot Password?