Amachine launches a tennis ball at an angle of 25° above the horizontal at a speed of 14 meters per second. the ball returns to level ground. which combination of changes must produce an increase in time of flight of a second launch?
a. decrease the launch angle and decrease the ball’s initial speedb. decrease the launch angle and increase the ball’s initial speedc. increase the launch angle and decrease the ball’s initial speedd. increase the launch angle and increase the ball’s initial speed
Answers: 1
Physics, 21.06.2019 23:20
Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity
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Astudent is working in the lab to determine how time affect impulse the student keeps the force the same in each row but changes impact the time some data is shown witch trial has the greatest a student is working in the lab to determine how time affect impulse the student keeps the fours the same in each row but change is the impact time some data shown witch trial has the greatest impulse
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Physics, 22.06.2019 10:00
Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?
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Physics, 22.06.2019 11:00
1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?
Answers: 1
Amachine launches a tennis ball at an angle of 25° above the horizontal at a speed of 14 meters per...
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