Is there anyone here who is good at Physics and is willing to help? I need help and I'm getting desperate.

Ascientist is tracking an object orbiting the sun that is found between mars and jupiter. in order to classify the object as an asteroid, it must be at least

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge