Select the correct answer A car is moving at a constant speed along a straight line, which statement is true about the forces acting on the car?
The net force acting on the car from all directions is zero.
The net force acting on the car is greater than the car's weight
The net force acting on the car is in the direction of the car's motion
The net force acting on the car is in the opposite direction of the car's motion
D
Reset
Next

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).

Determine the maximum r-value of the polar equation r =3+3 cos 0

Could someone . i have tried to solve myself but my calculation is off