Recent content by Matt_h

Homework Statement Is it always true that |A+B|=|A|+|B|? The Attempt at a Solution My quick answer to this question was no. But when i was asked why i really couldn't come up with much. any help is appreciated!

Homework Statement Problem 2 (35 points): A projectile of mass mA=20g is shot towards a block of mass MB= 5kg with a velocity of vA=400m/s. The block is at rest, attached to a horizontal massless spring (at equilibrium) with k=500N/m. a. If the collision between the projectile and the...

a child (m=30kg) sits 5m from the axis of rotation on a flat turn table which makes a full rotation every 8 seconds. A. find the childs period (t) and frequency (f) Full rotation every 8 seconds, T=8 Frequency = inverse of period = 1/8 B. What is the tangential velocity of the child? Vtan=ωR...

Acceleration would be 0, right? or no acceleration?

I'm not sure that i do, do you mind explaining it?

Oh, ok Using F=ma i found out that the force due to gravity is 70kg*9.81m/s^2=686.7N Would i then just plug this force into the magnitude equation above to find the velocity? After plugging it in i got 60.1 m/s Does that sound about right?

I'm in physics 1 in college and reviewing for an up coming exam, ran into this problem and can't seem to figure out how to solve it. A 70 kg skydiver experiences a drag force as a function of velocity (in m/s), opposite the direction of motion, whose magnitude is given Fd(v)=0.19v^2...