Recent content by Ineedhelpwithphysics

Im confused I did 850*9.8*14.7 = 1.2x10^5 Why is it not negative since the force is opposite to the motion?

For A the 1.2 kg block is being pulled by gravity hence work is done downwards which will make work positive since it's going with the same direction as the force. 1.2 * 9.8 = 11.76 N pulled downwards Work = F*d 11.76*0.75 = 8.82 J The tension is the other force and since the thing is...

I did wrong calculations please ignore this

I did this too fast idk if I'm wrong So for the x component use the formula d = rt / delta x = v*t 26 = vcos(theta) y component use the displacement formula 19.6 = vsin(theta) tan^-1(19.6/26) = 36.5 degrees the answer key says 20.2 degrees idk whats wrong

The displacement equation?

oh displacement is -30 from the cop to the car if i choose the car to be zero, and its 30 meters from the cop to the car if i choose the cop to be 0

t+1 so its 11 not 10.92

do i add one because after one second???

Why is it 10.92 seconds and not 10 Cars displacement = 30*t +1/2(0)t^2 police displacement = 0*t + 1/2(6)(t)^2 30t = 3t^2 t = 10 seconds ???

I think i get it now. 6.78 is the initial velocity at the top of the door To find the height of the ladder I would have to make 6.78 the final velocity, and the initial velocity 0 I find the time between the rock dropping from the top of the ladder to the top of the door. Then using the...

When I drop a rock from the top of my ladder, I notice that it takes 0.25 seconds for the rock to fall past our 2-m tall door and hit the ground below. What was the velocity of the rock when it passed the top of the door? How tall is my ladder? You're suppose to take -6.78 m/s as the final...

it's not given it asks the height of the ladder after the first question.

I am super stumped at this question, the answer key is telling me 6.78 downwards, i think I'm reading and observing the question wrong. Isn't final velocity 0 so why can't i do 0 = v0 -9.8(0.25) -2.45 = v0 But when I use the second the equation -2 (displacement of door) = v0(0.25) + 1/2...

My answer is R > P > Q = S Since R is more steeper than P the speed is greater, speed is a non-negative unit so i assume that speed of R will be greater than P Speed of P has a positive slope, also the magnitude is positive. Q and S are the same due to the fast that they both horizontal slopes...

sorry about that