plz help me locate a thread for physics and chemistry students

You have just started one already, post a question or a topic for discussion and be marvelled at the replies you get

johnpaul1101: plz help me locate a thread for physics and chemistry students

I av searched and was already tired sef, tnx 4 dis 1, it will kick-start the learning

Richiez: You have just started one already, post a question or a topic for discussion and be marvelled at the replies you get

Oga richiez, I cut reps 4 u o, d maths thread u opened made us want more on physics and chemistry. Tnx 4 dat grate idea, we apreciate.

Chelcy10: Oga richiez, I cut reps 4 u o, d maths thread u opened made us want more on physics and chemistry. Tnx 4 dat grate idea, we apreciate.

thanks bro! i'd also make contributions on this thread. pls moderators help us give the thread a suitable name. odunnu whr are u?

Richiez: You have just started one already, post a question or a topic for discussion and be marvelled at the replies you get

if i poste the question, who will answer it then?

johnpaul1101:
if i poste the question, who will answer it then?

here we are by God's grace

ok then, let's start with momentum:
a man whose mass is 80kg stands on a spring weighing machine inside an elevator. What is the reading of the weighing machine when
-the elevator starts to ascend with an acceleration 2.0m/s square?
-the elevator is moving with a uniform velocity
-the elevator is coming to rest with a retardation of 4.0m/s square

johnpaul1101: ok then, let's start with momentum:
a man whose mass is 80kg stands on a spring weighing machine inside an elevator. What is the reading of the weighing machine when
-the elevator starts to ascend with an acceleration 2.0m/s square?
-the elevator is moving with a uniform velocity
-the elevator is coming to rest with a retardation of 4.0m/s square

.the answers are:
weight when ascending:960
weight when uniform:800
weight when retarding:640