American University in Cairo - PHYSICS 1011 1)If M = 6

American University in Cairo - PHYSICS 1011

1)If M = 6.0 kg, what is the tension in string 1?

 

 

 

 

1. 1. 39 N
   2. 34 N
   3. 29 N
   4. 44 N
   5. 51 N

 

 

 

2. A block is pushed up a frictionless 30? incline by an applied force as shown. If F = 25 N and M = 3.0 kg, what is the magnitude of the resulting acceleration of the block?

 

 

 

 

a.   2.3 m/s²

b.   4.6 m/s²

c.   3.5 m/s²

d.   2.9 m/s²

e.   5.1 m/s²

 

 

 

3. A book is placed on a chair. Then a videocassette is placed on the book. The floor exerts a normal force
   1. on all three.
   2. only on the book.
   3. only on the chair.
   4. upwards on the chair and downwards on the book.
   5. only on the objects that you have defined to be part of the system.

4. A constant force F is applied to a body of mass m that initially is headed east at velocity v₀ until its velocity becomes ?v₀. The total time of travel is 2t. The total distance the body travels in that time is

a.

b.

c.

d.

e.

.

5. A block is pushed across a horizontal surface by the force shown. If the coefficient of kinetic friction between the block and the surface is 0.30, F = 20 N, ? = 30?, and M = 3.0 kg, what is the magnitude of the acceleration of the block?

a.   2.8 m/s²

b.   2.3 m/s²

c.   1.8 m/s²

d.   3.3 m/s²

e.   5.4 m/s²

6. When you drag a toy teddy bear along the floor by a force that is parallel to the floor, the magnitude of the force of friction
   1. is independent of velocity or acceleration.
   2. increases when the velocity increases.
   3. is proportional to the acceleration.
   4. decreases when the force parallel to the floor increases.
   5. increases when the force parallel to the floor increases.