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chap 12

20 questions from the practice test

QuestionAnswer
the SI unit of force is the...? newton
which of the following relationships is correct...? 1N = 1 KG x M/s squared
projectile motion is caused by...? the downward force of gravity and an initial forward velocity
the property of matter that resists changes in motioni is called...? inertia
an orange might roll off your cafeteria tray when you stop suddenly because of...? the balanced forces acting on the orange
your weight equals your...? mass divided by the net force acting on you
the acclereation dut to gravity on the surface of mars is about one third the accleration dut to gravity on earths surface. your weight of a space probe on the surface of mars is about...? one third its weight on earths surface
in which of the following are action and reaction forces involved? all of the above
what is conserved when two objects collide in a closed system? momentum
what is the momentum of a 50 kilogram ice scater gliding across the ice at a speed of 5 m/sec? (f=M x A) 250 KG x M/ s
what force is responsible for the repulsion between two positivley-charged particles? electric
as an astronaut travels far away from earth, her weight...? decreases because gravity decreases
the force that keeps an object moving in a circle is called...? centripetal force
the centripetal force acting on a satellite in orbit all of the above
the sun of all the forces acting on an object is called the ___ _____ net force
the force that opposes the motion of objects that touch as they move past eachother is ________ friction
the acceleration og an object is equal to the net _____ acting on the object divided by the objects ____ friction, mass
it usally takes more than force to start an object sliding than it does to keep an object sliding because staic friction is usally _______ than sliding friction greater
the path of motion of a thrown javelin is an example __________ motion projectile
how can an arrow be used to represent size and direction of force? the length of the arrow equals size of force. the point of the arrow equals direction of force
Created by: nevaeh.frye
 

 



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