11.An object at the end of a string is used as a conical pendulum. Which of the following would you need to know in order to calculate the tension in the string?
(A) The angle
(B) The mass of the string
(C) The mass of the object
(D) The frequency of its motion

Achild throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. the ball leaves her hand 1.00 m above the ground. how long is the ball in flight before it hits the ground?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?