Emily Grossman

How do you solve this problem? A ball on the end of a string is revolved at a uniform rate in a vertical circle radius of 72.0 cm, as shown in figure. If its speed is 4.00m/s and its mass is .300 kg. Calculate the tension in the string when the ball is a)...

How do you solve this problem? How fast (in rpm) must a centrifuge rotate if a particle 9.00cm from the axis of rotation is to experience an acceleration of 115,000 g's?

How to solve/ work this problem? If a curve with a radius of 88m is perfectly banked for a car traveling 75 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 95km/h?

How to solve/work problem? Two objects attract each other gravitationally with a force of 2.5 * 10^-10 N when they are .25m apart. Their total mass is 4.0kg. Find their individual masses.

A ski starts from rest and slides doen a 22 degree incline 75m long. a) if the coefficient of friction is 0.090, what is the ski's speed at the base of the incline? b). If the snow is level at the foot of the incline and has the same coefficient of fricti...

A 65kg trampoline artist jumps vertically upward from the top of a platform with a speed of 5.0m/s. a) How fast is he going as he lands on the trampoline, 3.0m below. b) if the trampoline behaves like a spring with a spring stiffness constant 6.2*10^4N/m,...

I need help classifying these as physical or chemical changes! 1. sodium metal exposed to air turns dark gray. 2. steam in a test tube condenses to moisture. 3. baking soda in vinegar releases bubbles. 4. water dissolves in vinegar to give a solution. 5....

Can you like work the problem out so i can see how it is done?

what is the V in this case? That's what throwing me off..

Okay, I worked them out, but I am not getting the answer they should be. Like a) i am getting as what should be the answer as b. So, i don't if someone could work them out or tell me maybe what doing wrong. Thanks!

I am confused, can someone show me how to work this problem? I really need help!

Okay, so for a) get 3.13 and b). get 16.5?

How do you work this problem out??

I get what you were doing, but I still need help on how to work this one, like step by step.

So do you take 2.5*10^-10N (4.0)/.25^2?

So is it 2.5*10^-10(m)(4-m)/(.25)^2? Then solve from there?

Can you show me step by step with the numbers in there? I am confused..

Okay, thanks! I think I figured it out, if not will ask you tomorrow!!

I know that, but you like help me figure it out like what to do; please!!

So then you have to convert it to joules?