Physics work

[chiddler]

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Theta is 60 degrees, F is 50 N. If a block is moved from rest along the surface for 200 m, and the surface is frictionless, what is final velocity of the block?

Answer: 10 m/s.

Book explanation: The work done on block is manifested as KE: W = Fdcos(theta) = 1/2 mv^2

I've been trying to figure this out for a while, but every solution I can think of requires the mass of the block.

50 * 200 * 0.5 = 1/2 m * v^2

right?

Thank you <3

 

[chiddler]

editing complete.

 

[MedPR]

Theta is 60 degrees, F is 50 N. If a block is moved from rest along the surface for 200 m, and the surface is frictionless, what is final velocity of the block?

Answer: 10 m/s.

Book explanation: The work done on block is manifested as KE: W = Fdcos(theta) = 1/2 mv^2

I've been trying to figure this out for a while, but every solution I can think of requires the mass of the block.

50 * 200 * 0.5 = 1/2 m * v^2

right?

Thank you <3

is this in tbr?

 

[MT Headed]

Smells like a typo in EK to me. Yes, you can't solve it without the mass.

What must the mass have been, in kg?

 

[chiddler]

is this in tbr?

EK #336

WOW

They did give mass! I got up to eat, then returned and forgot about the relevant image...

Shame shame shame :'(

Smells like a typo in EK to me. Yes, you can't solve it without the mass.

What must the mass have been, in kg?

Thanks for your help :<

it's 100 kg lol

 

[MedPR]

EK #336

WOW

They did give mass! I got up to eat, then returned and forgot about the relevant image...

Shame shame shame :'(



Thanks for your help :<

it's 100 kg lol

🙂 Good thing you can't get up to eat during your MCAT.