Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Feb 16 Test Review

Balanced & Unbalanced Forces, Simple Machines, & Energy Transformations

QuestionAnswer
What affects gravitational potential energy? An object's height and weight
How can you increase the gravitational potential energy of an object? Increasing the height and/or weight will increase the gravitational potential energy
What is kinetic energy? Kinetic energy is the energy of motion
What affects the kinetic energy of an object? An object's speed and mass
How can you increase an object's kinetic energy? Increasing the speed and/or mass will increase an object's kinetic energy
What is an energy transformation? When energy changes from one form to another
What energy transformation takes place in solar panels? radiant energy to electric energy
What causes a resting object to move? unbalanced forces change an object's motion; net force is not equal to zero
What results from balanced forces? Balanced forces cause no change in motion; net force is equal to zero
What is net force? Net force is the sum of all objects acting on an object
What happens when unbalanced forces act on an object? the object moves in the direction of the greater force
What are simple machines? Simple machines make work seem easier
How do simple machines affect work? Simple machines change the amount, direction, or distance of the effort force
What is mechanical advantage? A simple machine's mechanical advantage measures how much the machine affects the force needed to do work. It measures the benefit of using the machine.
How do you increase an inclined plane's mechanical advantage? Make the ramp longer and less steep
How do you make a pulley system most beneficial? A system with more pulleys and longer ropes has the greatest mechanical advantage
How does one pulley affect work? One pulley changes the direction of the force
What happens to force as the length of a ramp increases? The force needed to do work will decrease when the ramp length increases
Does it require less force to lift an object straight up or pushing/pulling a load up a ramp? Less force is needed to push or pull an object up a ramp
What is the law of conservation of energy? This law states that energy cannot be created or destroyed; it only changes form
What energy transformation occurs in a battery-powered laptop? chemical PE to electric KE to light and sound KE
What energy transformation occurs when an electric fan is used? electric KE to mechanical and sound KE
What is the speed of an object moving 50 miles in 10 hours? speed = distance/time speed = 5 miles per hour
Created by: marybuchholz