The engine of a motorcycle changes the speed of the motorcycle from 16 m/s to 20 m/s in 10.0 s. The mass of the motorcycle is 300 kg. What is the acceleration of the motorcycle **use a kinematic equation**?

What net force must the engine be producing?

If there is a frictional force pushing backwards at -50 N, what force must the engine produce to produce the same change in speed **Think how you would get the net force with this -50N?

Ajogger runs 5.0 km on a straight trail at and angle of 60 south of west . what is the southern component of the run rounded to the nearest tenth of a kilometer

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).

What object a collides with object b and bounces back its final momentum is?