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# 1) An object is moving with constant velocity. Which of thefollowing statements is true?a) A constant force is being applied in the direction ofmotion.b) A constant force is being applied in the direction opposite ofmotion.c) There are no forces acting on the object.d) The net force on the object is zero.e) There is no frictional force acting on the object. 2) You apply the same force to two objects. Object 1 has mass M andobject 2 has mass 5M.a) ten times that of object 1 b) five times that of object 1c) the same as that of object 1 d) 1/5 as that of object 1 3) An object of weight W is in free-fall close to the surface ofEarth. What is the force that the object exerts on Earth?a) a force greater than W b) a force less than Wc) a force equal to W d) no force at all 4) A parking crate slides down an inclined ramp at constantvelocity. Thus we can deduce that _a) a frictional force is acting on itb) a net downward force is acting on itc) a net upward force is acting on itd) it is not acted on by appreciable normal forcee) it is not acted on by appreciable gravitational force 5) A person applies a constant force of 20N to a rock of mass1000kg for a total of 20 seconds. What is the work done by thisperson if the person does not move at all by this appliedforce?a) 1000J b) 2000J c) 20,000J d) 0J e) 400J 6) If the net work done on an object is positive, then theobject's kinetic energy.a) decreases b) remains the same c) increases d) is zero 7) You throw a ball straight up. Compare the sign of the workdone by gravity while the ball goes up with the sign of the workdone by gravity while it goes down.a) Work is + on the way up and + on the way downb) Work is + on the way up and - on the way downc) Work is - on the way up and + on the way downd) Work is - on the way up and - on the way down

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