Which combination of units can be used to express work? (1) newton - second (3) newton/meter meter (2) newton - meter second

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1 '- (q ) ;) Vo ('{\ r4 c.\. er ;V6,-, e (D Which is an S{ UJlit for work done on an object? (1) kg-m2 (3) s2 s (2) kg- m2 s (4) 2 S c1j Which combination of units can be used to express work? (1) newton - second (3) newtonmeter meter (2) newton - meter second (4) newton-meter (j) - Which pair of quantities can be expressed using the same units? (1) work and kinetic energy (2) power and momentum (3) impulse and potential energy (4) acceleration and weight ) 'work to be done on an Objec (1) lifting the object from the floor to the ceiling (2) pushing the object along a horizontal floor along a frictionless surface (3) decreasing the speed of the object until it comes to rest (4) holding the object stationary above the ground (2) A force is applied to a block causing it to accelerate along a horizontal, frictionless surface. The energy gained by the block is equal tp the (1) work done on the block. (2) power applied to the block (3) impulse applied to the block (4) momentum given to the block The total work done in lifting a typical high school physics textbook a vertical distance of.1 meter is approximately (1).15 J (3) 15 J (2) 1.5 J (4) 15 J - 11)1< -= <J.1:7\A IA)

2 6J The w;-k done in lift:mg an apple one meter near Earth's swface is approximately. (1) 1J (3) 1 J ( (2).1J (4) 1J , Through what vertical distance is a 5.-newton object moved if 25 joules of work is done against the gravitational field of Earth? (1) 2.5 m (3) 9.8 m (2) 5. m (4) 25 m ,, h 6J \ A GO.-kilogramstudent climbs a ladder a vertical distance of 4. meters in 8. seconds. Approximately how much total work is done against gravity by the student during the climb? (1) 2.4 x I()3 J (3) 2.4 x I()2 J (2) 2.9 x I()2 J (4) 3. x 11J A net force with a magnitude of 5. newtons moves a 2.-kilogram object a distance of 3. meters in 3. seconds. What is the total work done on the object? (1) 1. J (3) 15 J (2) 1.J (4) 3.J A boy pushes his wagon at constant speed along a level sidewalk. The graph below represents the relationship between the horizontal force exerted by the boy and the distance the wagon moves ẕ CD Co) a.. U Force vs. Distance What is the total work done by the boy in pushing the wagon 4. meters? (1) 5. J (3) 12 J (2) 7.5 J (4) 18 J Distance (m)

3 A 2.2-kilogrammass is pulled by a horizontal 3.-newton force to th,e right through a distance of 5. meters as shown in the diagram below. 3.N..- 5.m--l What is the total amount of work done on the mass? (1) 11J (2) 66J (3) 15J (4) 33J Ii) - A 15.O-kiIogrammass is moving at 7.5 meters per second on a horizontal, frictionless surface. What is the total work that must be done on the mass to increase its speed to 11.5 meters per second? (1) 12. J (3) 57. J (2) 422 J (4) 992 J 7 (n. ". 5 Q II. j ').. Q \..(...- (fj) Dlatance - " 11. Horizontal Time (s) Distance Moved up the Remp (m) :[ 9. Q. E 8.1.: 7.1 g ' 6.!'t :. 5.-.!II S r-.. I TIme(s).- - The diagram shows a worker moving a 5. kilogram safe up a ramp by applying a constant force of 3. newtons parallel to the ramp. The data table shows the distance the safe has moved as a function of time Using the information in the data table, plot the data ppints and draw the best-fit line. [2]. Calculate the work done by the worker in the first 3. seconds. units.] [Show all [2] calculations, including the equation and substitution with

4 wn in the diagram below, a stude an average force of6. newtons on a rope to lift a 5O.-kilogram crate a vertical distance of 3. meters. r d =3. m Compared to the work done by the student, the gravitationalpotential energy gained by the crate is (1) exactly the same (3) 33 Jmore (2) 33 }less (4) 15 J more Cl The diagram below represents a 155-newton box on a ramp. Applied force F causes the box to slide from point A to point B. 5.3m 1 If\' What is the total amount of gravitational lly potential energy gainedby the box? (1) 28.4 J (3) 868 J (2) 279 J (4) 274 J ( ) If fj...e r( Uj ed I-Q jla.$j, th t7clx up fj...e rcjl"'1fj vere. f-:::'on F:''lJ f""e vrl< JCJ'1t " Ih(!. b.x Q'''IJ f-h.e W(Jr K I().JJ Ie. F:- 1<) ic. rt

5 ' A force of 6. newtons is applied to a rope to pull a sled across a horizontal surface at a constant velocity. The rope is at an angle of 3. degrees above the horiwntal. Horizontal surface t- isme }e.- f! ( Calculate the magnitude of the component of the 6.-newton force that is parallel to the horizontal surface. [Show all work, including the equation and substitution with units.] [2] (ID f.f fi-.,t. Fa c-u '-'()"Ve) e.5)ej 8 r""\e fer (<1rv'o. -J> (ion) 1 J e V<J," d<jnf <1 the,f) e).