I tried to find the acceleration by doing F=ma, a=F/m by finding the force in the perpendicular direction, and using the mass that was given. What am I doing wrong and how can I get the answer
in #8 they give you enough information to find the acceleration of the block using kinematics. The initial velocity vo=0; they give you the distance and the time. Use the x= equation to find the acceleration.
#9: Starting by looking at the forces in the perpendicular direction is a really good start for #9. Notice that there is no acceleration in the perpendicular direction since the block is not levitating off the incline. But, using the forces in the perpendicular direction, you can find the normal force. You will need that.
Next, look at the forces in the direction parallel to the incline. One of the forces is the force due to friction, and Ff=μN. That is where you will use your normal force (that you just found) and you will solve for μ (which is what #9 is asking for).
1 comment:
in #8 they give you enough information to find the acceleration of the block using kinematics. The initial velocity vo=0; they give you the distance and the time. Use the x= equation to find the acceleration.
#9: Starting by looking at the forces in the perpendicular direction is a really good start for #9. Notice that there is no acceleration in the perpendicular direction since the block is not levitating off the incline. But, using the forces in the perpendicular direction, you can find the normal force. You will need that.
Next, look at the forces in the direction parallel to the incline. One of the forces is the force due to friction, and Ff=μN. That is where you will use your normal force (that you just found) and you will solve for μ (which is what #9 is asking for).
Good luck.
Post a Comment