Recent content by emily081715

so just tan (19)

well actually i know its incorrect

so my original answer was in my radians and i did 9.8 tan (19) in degrees and got 3.4 as the answer, is that to big?

i don't understand?

i need help figuring out my error, i assumed that the N force was equal to mgcosθ and Fs was equal to mgsinθ. the masses must cancel out and following what is written on my paper, i got and answer of 0.15. this is incorrect and i need help finding out why

Homework Statement If the incline of the driveway is 19 ∘ from the horizontal, what must the minimum coefficient of static friction be between your shoes and the ice? Homework Equations Fs=uN The Attempt at a Solution

i've never learned sheer modulus so i don't know. isn't the work going into the geletin

my question is that i am lost and frusterated with this question and that i need help walking through it to figure out the answer

0.6 comes from the highest point of the centre of mass added to the lowest point ( 0.5 +0.1) i'm assuming it does exert the max force at all time during the push

i'm asking where my error is because i believed that was the right way to do it

By how much does your force change the kinetic energy of the center of mass? this is the question

thats the question i could've canceled out the mg but calculating them doesn't change anything, they cancel out on their own

if the maximum force the dog can exert on the ground in pushing off is 2.1 times the gravitational force Earth exerts on him, how high can he jump?

Homework Statement A 11-kg dog jumps up in the air to catch a ball. The dog's center of mass is normally 0.20 m above the ground, and he is 0.50 m long. The lowest he can get his center of mass is 0.10 m above the ground, and the highest he can get it before he can no longer push against the...