NEED HELP! An astronaut, visiting a newly discovered planet, finds the acceleration due to gravity by dropping an object
from a height of 1.0 meter and measuring how long it takes the object to hit the ground. If it takes the object
0.8 seconds to hit the ground, what is the acceleration due to gravity on this planet?
A. 3.1 m/s2
B. 2.5 m/s2
c. 1.6 m/s2
D. 0.78 m/s2

The slotted link is pinned at o, and as a result of rotation it drives the peg p along the horizontal guide. compute the magnitude of the velocity and acceleration of p along the horizontal guide. compute the magnitudes of the velocity and acceleration of p as a function of θ if θ=(3t) rad, where t is measured in seconds.

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap