2. At the highest point of its flight, a ball thrown upward will have zero b. velocity d. a and c a. acceleration C. mass 3. In a projectile motion, which velocity component is affected by the force of gravity? a. the horizontal component b. the vertical component c. both the horizontal and vertical components d. neither the horizontal nor the vertical components

2. At the highest point of its flight, a ball thrown upward will have zero b. velocity d. a and c a. acceleration C. mass 3. In a projectile motion, which velocity component is affected by the force of gravity? a. the horizontal component b. the vertical component c. both the horizontal and vertical components d. neither the horizontal nor the vertical components

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter3: Two-dimensional Kinematics

Section: Chapter Questions

Problem 27PE: A ball is thrown horizontally from the top of a 60.0-m building and lands 100.0 m from the base of...

See similar textbooks

Similar questions

A basketball player is running at 5.00 m/s directly toward the basket when he jumps into the air to dunk the ball. He maintains his horizontal velocity. (a) What vertical velocity does he need to rise 0.750 m above the floor? (b) How far from the basket (measured in the horizontal direction) must he start his jump to reach his maximum height at the same time as he reaches the basket?
A projectile is launched with an initial speed of 60.0 m/s at an angle of 30.0 above the horizontal. The projectile lands on a hillside 4.00 s later. Neglect air friction, (a) What is the projectiles velocity at the highest point of its trajectory? (b) What is the straight-line distance from where the projectile was launched to where it hits its target?
A placekicker must kick a football from a point 36.0 m (about 40 yards) from the goal. Half the crowd hopes the ball will clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 20.0 m/s at an angle of 53.0 to the horizontal, (a) By how much does the ball clear or fall short of clearing the crossbar? (b) Does the ball approach the crossbar while still rising or while falling?
A ball is thrown horizontally from the top of a 60.0-m building and lands 100.0 m from the base of the building. Ignore air resistance. (a) How long is the ball in the air? (b) What must have been the initial horizontal component of the velocity? (c) What is the vertical component of the velocity just before the ball hits the ground? (d) What is the velocity (including both the horizontal and vertical components) of the ball just before it hits the ground?
When a field goal kicker kicks a football as hard as he can at 45 to the horizontal, the ball just clears the 3-m- high crossbar of the goalposts 45.7 m away. (a) What is the maximum speed the kicker can impart to the football? (b) In addition to clearing the crossbar, the football must be high enough in the air early during its flight to clear the reach of the onrushing defensive lineman. If the lineman is 4.6 m away and has a vertical reach of 2.5 m, can he block the 45.7-m field goal attempt? (c) What if the lineman is 1.0 m away?
2. A ball is thrown at an angle to the horizontal. Neglecting air resistance, the acceleration of the ball when it is in the air...a. It is constantb. decreases then increasesc. changes directiond. it is zero
Choose the letter of the best answer. Write the chosen letter on a separate sheet of paper. 1. A sepak takraw that is kicked from a height of two meters follows a path that is a. circular b. linear c. hyperbolic d. parabolic 2. At the highest point of its flight, a ball thrown upward will have zero a. acceleration b. velocity d. a and c C. mass 3. In a projectile motion, which velocity component is affected by the force of gravity? a. the horizontal component b. the vertical component c. both the horizontal and vertical components d. neither the horizontal nor the vertical components 4. What happens to the horizontal component of the velocity of a projectile as it moves? a. it increases c. it remains unchanged d. insufficient data b. it decreases 5. What is the direction of the acceleration for any projectile? a. down b. up C. sideways d. the direction the projectile is travelling 6. What effect does the mass of a projectile have on the time it's in the air? (Neglecting air resistance)…
6. Josh kicks a soccer ball with an initial vertical velocity of 12 m/s and an initial horizontal velocity of 20 m/s when it leaves his foot. The ball experiences a constant vertical acceleration of 9.81 m/s? downward while it is in the air. a. What is the ball's horizontal velocity 2s after it leaves Josh's foot? b. What is the ball's vertical velocity 2 s after it leaves Josh's foot?
Algebra 7. A projectile is fired at 60 above the horizontal line with an initial velocity v. At which of the following angles the projectile will land at the same distance as it is landed in the first trial? A. 20 D. 45* C. 40 B. 30 Vo 8. When a projectile reaches its highest point, the vertical component of the acceleration is: A. Greater thang D. B. Positive g C. Negative g Zero 600 9. When a projectile reaches its highest point, the horizontal component of the acceleration is: A. Less than g B. Positive g C. Negative g D. Zero 10. An object is thrown horizontally with an initial velocity, v. = 5 m/s, from the roof of a building 40 m tall. How much later does it hit the ground? B. V5 s C. Vs s A. 4 s D. 10 s 11. A projectile is fired from the ground level with an initial velocity v,. Which of the following statements is true? A. Vertical component of the velocity at point C is v, cose B. Horizontal component of the velocity at point C is v,sine C. The projectile travels with the same…
A student throws a 2.5kg ball horizontally off the top of a building with an initial speed of 4.25 m/s. At the same time, another student throws a 1.12kg ball along the same trajectory with the same initial speed. Which of the balls hits the ground first? a. The 2.5kg ball. b. They hit at the same time. c. The 1.12kgball.
A rock is thrown off a cliff at an angle of51ºwith respect to the horizontal. The cliff is 110 m high. The initial speed of the rock is 30 m/s. a.How high above the edge of the cliff does the rock rise? b.How far has it moved horizontally when it is at maximum altitude? ( c.How long after the release does it hit the ground? d.What is the range of the rock? e.What are the horizontal and vertical positions of the rock relative to the edge of the cliff att= 2.0 s,t= 4.0 s, andt= 6.0 s?
10. A military jet flies horizontally with a velocity of 450 m/s and 20,000 m above the ground. When the jet is straight above an artillery gun a shell is fired. Assuming the shell hits the jet. a. Calculate the horizontal component of the initial velocity of the shell. b. Calculate the vertical component of the initial velocity of the shell.