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Simple Machines I
Quiz by Rex Williams
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11 questions
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- Q1You have to move a heavy box up on to a high platform. Which simple machines could you use?Pulley or inclined planePulley or wheel and axleInclined plane or leverWheel and axle or lever30s
- Q2What do simple machines change?The amount of work and the amount of force.The amount of force, but not the amount of work.The amount of distance, and the amount of work.The amount of work, but not the amount of force.30s
- Q3You push a heavy box, but it doesn't move. Are you doing work?Yes. You got paid.No. Work requires force and distance.Yes. Work requires force.No. You didn't use force.30s
- Q4True or false: levers can allow you to lift very heavy objects.No, levers don't change the amount of force you use.Yes, levers increase the amount of force you can use.No, levers can't increase the amount of work you do.Yes, levers increase the amount of work you can use.30s
- Q5If you use many pulleys together, then...The amount of force needed increases, and the work stays the same.The amount of work and the amount of force decrease.The amount of force needed decreases, but the work stays the same.The amount of work decreases, but the force stays the same.30s
- Q6The Law of Conservation of Energy states....An object in motion tends to stay in motion.Energy can never be created, but can sometimes be destroyed.Energy relies on force and distance.Energy can never be created or destroyed.30s
- Q7Which simple machine would you use to reduce the friction of a moving object?Inclined planeWheel and axleLeverPulley30s
- Q8Friction reduces the amount of kinetic energy in a moving object. This energy...Turns into potential energy.Turns into heat, or thermal energy.Is destroyed.Turns into friction energy.30s
- Q9You push a box 10 meters with a force of 10 Newtons. What is the amount of work done?10 N1 Joule100 Joules10030s
- Q10You push a box across a floor. You do 30 Joules of work by exerting 6 Newtons of force. How far did it go?5 meters180 Joules5 Joules180 meters30s
- Q11You push a box to the top of a shelf using a 10 meter ramp, doing 50 Joules of work. You then try again with the same box and the same shelf, but using a shorter, steeper 5 meter ramp. How much work do you do?50 Joules25 Joules250 Joules100 Joules30s