4. A student throws a ball vertically upwards and catches it after 4 s. The student’s data is used to plot a velocity-time graph for the ball.
VIHS / Physics department / 2020 Page 1 of 4

As / Unit 1: Mechanics and materials Work sheet on Motion Graphs

Using the graph, what is the acceleration of the ball? A 7.5 m s−2
B −7.5 m s−2
C 3.8 m s−2 D −3.8 m s−2

Abird sitting high in a tree is an example of what type of wnergy

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

What occurs during a combustion reaction