Calculate the deceleration (in m/s2) of a snow boarder going up a 2.65° slope assuming the coefficient of friction for waxed woo
d on wet snow. the equation a = g(sin(θ) − μk cos(θ)) for a snow boarder going downhill may be useful, but be careful to consider the fact that the snow boarder is going uphill. (enter the magnitude.) m/s2
The answer: to solve this problem, we can use newton's second law
F=MxA M is the mass of the object in motion A is its acceleration (or deceleration) F the sum of all exterior forces in our case the exterior forces are Fk (the friction force) and P (force of gravity)
In fact, Fk is positive because the motion is upward, its value is Fk=μk MgcosΘ and P=MgsinΘ
so we have F=MxA= μk MgcosΘ + MgsinΘ, and from where A =μk gcosΘ + gsinΘ μk=0.1 (coefficient of static friction on ice)
Ultraviolet light. It can cause skin cancer and that is why we wear sunscreen. We also wear sunglasses because some research has shown that it can damage eyes. Although it can be dangerous, it can also kill certain bacterias.
