Exam 1 Review Question Preview (ID: 55562)


Kinematics, Forces, Work, Power, Energy Quick, Calculation-type Questions. TEACHERS: click here for quick copy question ID numbers.

If a force is perpendicular to the motion of some object, then the work done by that force is...
a) Positive
b) Zero
c) Negative
d) Not enough information

A 1000 kg car is initially going at 38 m/s when it hits a gravel road that is 25 m long. If the friction force on the car is 3000 N, then what is the final velocity?
a) 36 m/s
b) 28 m/s
c) 12 m/s
d) 32 m/s

What is the spring constant of a spring that has a potential energy of 2000 J when it is compressed y 25 cm?
a) 6400 N/m
b) 460 N/m
c) 64000 N/m
d) 4600 N/m

A ball is thrown at an angle of 30 degrees above the horizontal with an initial velocity of 12 m/s. How fast is the ball when it is 5 m in the air? (Ignore air resistance)
a) 67.8 m/s
b) 6.78 m/s
c) 7.86 m/s
d) 8.67 m/s

How much work is done by friction when a 50 kg object is pulled 7 m along a horizontal surface? (assume 0.5 for the coefficient of friction)
a) 1715 J
b) 1570 J
c) 7510 J
d) 1075 J

A Net Force acts on an 80 kg object with 600 N in the positive x-direction. If the object is pushed 30 meters from rest, what is the final velocity?
a) 122 m/s
b) 2.21 m/s
c) 12.2 m/s
d) 21.2 m/s

Which of the following is FALSE
a) Work done by friction is always negative.
b) Non-conservative work is equal to a change in potential energy
c) Total work is equal to the change in kinetic energy
d) Physics is super cool

Find the acceleration of a 13 kg object which is pulled to the right with a 50 N tension force and pulled upward with a 75 N tension force. Bonus points for indicating direction
a) 6.9 m/s/s
b) 9.6 m/s/s
c) 0.69 m/s/s
d) 0

Five workers use 100 N of force to push a 6000 kg object across a frictionless floor. If they do 8000 J of work on the box, how far did they push it?
a) 26 m
b) 16 m
c) 6.1 m
d) 61 m

Which statement is TRUE
a) Kinetic energy is the energy associated with position
b) Weight is a force
c) Gravity always does negative work
d) Physics is just plain awful

Play Games with the Questions above at ReviewGameZone.com
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 55562 in the upper right hand corner or click here.

TEACHERS / EDUCATORS
Log In
| Sign Up / Register