physics
posted by Carly .
A 3.90 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1N at an angle theta=32.5degrees above the horizontal, as shown.
a.) What is the magnitude of the acceleration of the block when the force is applied?
b.) What is the horizontal speed of the block 4.50 seconds after it starts moving?
c.)What is the magnitude of the normal force acting on the block when the force F is acting on it?
d.)If, instead, the floor has a coefficient of kinetic friction µk = 0.04, what is the magnitude of the frictional force on the block when the block is moving?
e.)What is the magnitude of the acceleration of the block when friction is being considered?
I got all of the answers except e!
a.) 14.1cos32.5 / 3.90 = 3.05
b.) V=Vo+at
0+3.05(4.5)= 13.725
c.) fv=mgfsin32.5
3.90(9.8)14.1sin32.5 = 30.64
d.) 0.04(30.64)
=1.2256
Cant figure out e. please help!
Respond to this Question
Similar Questions

physics
A 6.00 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1 N at an angle θ= 19.0° above the horizontal, as shown. What is the speed of the block 3.50 seconds after it starts moving? 
physics
A 6.00 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=14.1 N at an angle θ= 19.0° above the horizontal, as shown. What is the speed of the block 3.50 seconds after it starts moving? 
physics
A 3.26 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.4 N at an angle theta = 29.0° above the horizontal. The coefficient of kinetic friction between the block and the floor is 0.10. What is … 
physics
A 3.26 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.4 N at an angle theta = 29.0° above the horizontal. The coefficient of kinetic friction between the block and the floor is 0.10. What is … 
physics
A 4.5 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=13.50 N at an angle theta=30.0 degrees above the horizontal. What is the speed of the block 5.50 seconds after it starts moving? 
physics
A 3.24 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=11.8N at an angle theta=23.0degrees above the horizontal, as shown. What is the magnitude of the acceleration of the block when the … 
physics
A 3.24 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=11.8N at an angle theta=23.0degrees above the horizontal, as shown. What is the magnitude of the acceleration of the block when the … 
physics
I am trying to study for my exam i have tomorrow and this type of problem keeps giving me trouble can someone please help me:: A 3.24 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=11.8N … 
physics
A 5.56 kg block located on a horizontal floor is pulled by a cord that exerts a force F = 10.7 N at an angle theta = 17.0° above the horizontal, as shown in the Figure. The coefficient of kinetic friction between the block and the … 
Physics
A 4.96 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=13.7N at an angle theta=16.0degrees above the horizontal. What is the magnitude of the acceleration of the block when the force is …