Thread: Calculus heavy physics problem

A 5.00 crate is suspended from the end of a short vertical rope of negligible mass. An upward force is applied to the end of the rope, and the height of the crate above its initial position is given by +(0.61 )

What is the magnitude of the force when 3.60 ?

Alright, I have done about 20 physics problems that are due next week, and this is the last one. It is very heavy on calculus, which i am not good at. In fact, I don't even really know where to start on this one. Thanks for the help.

Originally Posted by CrusaderKing1

A 5.00 crate is suspended from the end of a short vertical rope of negligible mass. An upward force is applied to the end of the rope, and the height of the crate above its initial position is given by +(0.61 )

What is the magnitude of the force when 3.60 ?

Alright, I have done about 20 physics problems that are due next week, and this is the last one. It is very heavy on calculus, which i am not good at. In fact, I don't even really know where to start on this one. Thanks for the help.

surely you know how to take derivatives of polynomial expressions ...

Originally Posted by skeeter

surely you know how to take derivatives of polynomial expressions ...

Yes, If the question said use the derivative, and then find F(t), I would have understood it. I am very bad at starting problems!

Ok, I did derive the function and received 20.6848 for acceleration, with then multiplied by 5.00 kg = 103.424

Would the units be in N? Probably N right? Yes, I'm not very good at this yet.

Thanks for your help! Much appreciated.

Originally Posted by CrusaderKing1

Yes, If the question said use the derivative, and then find F(t), I would have understood it. I am very bad at starting problems!

Ok, I did derive the function and received 20.6848 for acceleration, with then multiplied by 5.00 kg = 103.424

Would the units be in N? Probably N right? Yes, I'm not very good at this yet.

Thanks for your help! Much appreciated.

incorrect

... recheck your calculations

at this level of calculus-based physics, you are expected to know the relationship between position, velocity, and acceleration ...

Originally Posted by skeeter

incorrect

... recheck your calculations

at this level of calculus-based physics, you are expected to know the relationship between position, velocity, and acceleration ...

65.88 N

I didn't realize that I need to derive the function twice.

I have calculus and physics this semester, and had only high school trig. before 5 weeks ago.

The value is definitely right, but the program(masteringphysics) won't accept "N" as the correct units.

would kg*m/s2 work?

Thanks.

Originally Posted by CrusaderKing1

65.88 N

I didn't realize that I need to derive the function twice.

I have calculus and physics this semester, and had only high school trig. before 5 weeks ago.

The value is definitely right, but the program(masteringphysics) won't accept "N" as the correct units.

would kg*m/s2 work?Thanks.

Not being familiar with what the "machine" wants, I can't really say ... it's worth a shot.

Originally Posted by skeeter

Not being familiar with what the "machine" wants, I can't really say ... it's worth a shot.

yes, I guess so.