Is this directed at the 2nd or 1st part of the question? I assume the first part is correct then?
If the contact force is vertical, then the angle it makes with the horizontal is 90 degrees?
Hello, I am actually doing this question as well. I am up to this bit:
b)What is the rate at which friction is doing work on him?
I am a bit confused about the direction of the velocity for friction. I assume its velocity is parallel to the incline?
This is what I have for part b so far. I'll...
Homework Statement
A horizontal force F is applied to hold a block, mass m = 1.7 kg against a vertical wall. The coefficients of kinetic and static friction between the block and wall are 0.81 and 0.87 respectively. F is gradually reduced until the block falls. Just before it falls, what is the...
Homework Statement
Part 1: I've worked out part 1 already. The answer is 4650m/s^2
A ball travels vertically downwards until it hits a concrete floor with speed 22.7-m/s. It then bounces vertically upwards at 10.8-m/s. Examination of a high speed video shows that the collision took 7.2-ms...