Movers left a 20 kg box sitting on the 40 degrees angled ramp from the back of their truck to the ground.

Fortunately, the box doesn’t slide.
a)  Draw a free-body diagram for the box. Make sure to clearly label your vectors.
b)  What force of static friction is needed to keep the box from moving? (If no friction is needed, explain why.)
c)  The movers place a second box (10 kg) on top of the first, and they still don’t slide (aside: do you know why?). Draw free-body diagrams for both boxes together and for the bottom box by itself. Make sure to clearly label your vectors.
d) It then starts to rain, which lowers friction on the ramp enough for the boxes to begin sliding together. If it takes 1.5 seconds for the boxes to slide down the 4 m ramp, what is the force of kinetic friction acting on the boxes? ,.

 

draw a free-body diagram for the car.

Ques:

Draw a free-body diagram for the car.

Draw the force vectors with their tails at the front bumper of the car. The location and orientation of your vectors will be graded. The exact length of your vectors will not be graded.

Make sure to include the following:

FThrust= Thrust Force

W= Weight

T= Tension Force

N= Normal Force

f= Friction Force

Your car is skidding to a stop at a high speed. Draw a free-body diagram of the car. Suppose that the car is moving to the right. Draw the force vectors with their tails at the dot. The orientation of your vectors will be graded. The exact length of your vectors will not be graded.

* Weight

* Air resistance

* Kinetic friction force

* Normal force

1. A box slides down a ramp with constant velocity. The ramp israised 14.0 degrees above the horizontal. Calculate the coefficientof kinetic friction between the ramp and the box. HINTS: What isthe acceleration of the box if it slides with constant velocity?Draw a free body diagram for the box and then write out thecorresponding Newton's Law equations.


2. A box slides down a ramp with a constant acceleration of 0.100m/s2. The ramp is raised 19.0 degrees above the horizontal.Calculate the coefficient of kinetic friction between the ramp andthe box. HINT: Notice that the velocity is not constant as it wasin the previous problem. However, the free body diagrams for bothof these problems are the same. Use the free body diagram to writeout the corresponding Newton's Law equations for x and y in thecase that the acceleration down the ramp is not zero