A graph titled velocity versus time has horizontal axis time (seconds) and vertical axis velocity (meters per second). A line has 5 straight segments. Line segment A runs from 0 seconds 0 meters per second to 1 seconds 30 meters per second. Then segment B runs to 3 seconds 30 meters per second. Then an unlabeled segment runs to 4 seconds 40 meters per second. Then an unlabeled segment runs to 5 seconds 40 meters per second. Then segment C runs to 6 seconds 10 meters per second. Then segment D runs to 7 seconds 10 meters per second. Then an unlabeled segment runs to 8 seconds 40 meters per second. Then an unlabeled segment runs to 9 seconds 40 meters per second. Then segment E runs to 10 seconds 20 meters per second. The graph shows the motion of a car. Which segments show that the car is accelerating? Select three options. A B C D E.

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.

Ithink it's  c. i'm sure 

The figure is missing but we can answer anyway.the correct answer is "releasing the string". in fact, when the person is holding the bow and the arrow, the kinetic energy of the arrow is still zero (because the arrow is not moving). the moment the arrow is released, it acquires a velocity v, so its kinetic energy will become different from zero: where m is the mass of the arrow and v its velocity.  all the other options, instead, do not increase the kinetic energy of the system: -  pulling farther back on the string : this will just increase the elastic potential energy of the system-  holding the arrow higher: this will increase the gravitational potential energy of the system (which is given by u=mgh, where h is the height above the ground)-  decreasing the mass of the arrow: this will decrease the gravitational potential energy of the system (which is given by u=mgh, where m is the mass)

False  i read once that you can't do more than two activities at once