Q1. A penny is fall from the top of the Empire State building (369 m above the ground). With what velocity does it strike the ground? Avoid the air resistance.
a) 86 m/s up
b) 60 m/s up
c) 70 m/s up
d) 85 m/s down
e) 60 m/s down
Q2. A projectile is projected from origin (yo = 0) with a velocity of 45.0 m/s at an angle of 30o above the horizontal. Describe the time it takes for the projectile to hit the ground?
a) 2.54 s
b) 3.02 s
c) 4.59 s
d) 5.31 s
e) 6.04 s
Q3. Vector A consists of a magnitude 4.0 units; vector B consists of magnitude 6.0 units. The angle between A and B is 60.0°. Describe the magnitude of A + B?
a) 8.7 units
b) 8.9 units
c) 6.9 units
d) 7.2 units
e) 7.8 units
Q4. An object is moving in the circular path with radius of 4.0 m. If the object moves via an angle of 45o, then the angle in radians is around....?
a) 0.25 radians
b) 0.53 radians
c) 0.79 radians
d) 1.02 radians
e) 1.44 radians
Q5. A CD consists of a diameter of 12.0 cm. If the CD is rotating at a constant angular speed of 200 revolutions per minute, then tangential velocity of a point on the circumference is....?
a) 2.11 m/s
b) 1.26 m/s
c) 2.78 m/s
d) 0.23 m/s
e) 3.64 m/s