What is the uniform acceleration that causes a train’s velocity to change from 25 m/s to 75 m/s in an 5.0-s period?

a. 20 m/s2
b. 5 m/s^2
c. 10 m/s2
d. 15 m/s^2

An object thrown vertically upward from the surface of a celestial body at a velocity of 36 m/s reaches a height of sequalsminus0.9tsquaredplus36t meters in t seconds. a. determine the velocity v of the object after t seconds. b. when does the object reach its highest point? c. what is the height of the object at the highest point? d. when does the object strike the ground? e. with what velocity does the object strike the ground? f. on what intervals is the speed increasing?

Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses that are 1 m apart

In an experiment, how can i change human errors? be specific.