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Easy Physics Test 2

A test by Oren Lahav.

Test Questions
  1. Question
    I'm carrying a cart. The handle is in an angle of 45 degrees to the ground. If I'm using a force of 20 N over a distance of 60 m for 20 seconds, what's the total amount of work I'm doing?
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  2. Question
    Using Newton's first law- I throw a rock in space, and it's traveling at a constant speed of 5 m/s. After 10 s, if no forces act on the rock, what will its speed be?
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  3. Question
    I'm ice skating! Yay. What's the coefficient of friction between my skates and the ice, if I'm 60 kg and kinetic friction is 50 N?
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  4. Question
    I'm standing on the moon. My mass is 60 kg. If on the moon the gravitational constant g= 4.6 (not 9.8 like on Earth), what's the normal force acting on me (with direction)?
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  5. Question
    I am pushing a box of mass 4 kg across the floor using a force of 10 N. If friction is 2 N, what's the acceleration of the box?
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