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7. A student in a lab exerts a 30 N force to pull a block a distance of 36 cm. If a total of 10 J of work is done, the angle between the force and the displacement is a. 89° d. 24° b. 22° e. none of the above c. 38° 8. A 100-g sparrow flying at 17.1 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.15 m b. 1.5 m c. 15.00 m d. e. 150 m 1500 m 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 7.2 x 106 km from the centre of Earth. a. 9.8 x 10 N/kg d. 1.7 x 10³ N/kg b. 7.6 x 10¹ N/kg e. 5.8 x 105 N/kg c. 1.7 x 10³ N/kg

7. A student in a lab exerts a 30 N force to pull a block a distance of 36 cm. If a total of 10 J of work is done, the angle between the force and the displacement is a. 89° d. 24° b. 22° e. none of the above c. 38° 8. A 100-g sparrow flying at 17.1 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.15 m b. 1.5 m c. 15.00 m d. e. 150 m 1500 m 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 7.2 x 106 km from the centre of Earth. a. 9.8 x 10 N/kg d. 1.7 x 10³ N/kg b. 7.6 x 10¹ N/kg e. 5.8 x 105 N/kg c. 1.7 x 10³ N/kg

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7. A student in a lab exerts a 30 N force to pull a block a distance of 36 cm. If a total of 10 J of work is done, the angle between the force and the displacement is a. 89⁰ d. b. 22° e. c. 38° 8. A 100-g sparrow flying at 17.1 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.15 m. b. 1.5 m. C. 15.00 m a. b. c. 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 7.2 x 106 km from the centre of Earth. 9.8 x 10-2 N/kg d. 1.7 x 10³ N/kg 7.6 x 10¹ N/kg e. 5.8 x 105 N/kg 1.7 x 10³ N/kg a. charging by a conductor. b. charging by electricity c. charging by an insulator. + 10. A piece of paper becomes electrically charged when a charged rod of plastic is placed close to it. This is referred to as 20 cm A D 20 cm + 24° none of the above d. e. P T 150 m 1500 m d. charging by contact e. charging by induction 11. Four charged spheres, K, D, P, and V are arranged as shown below. Sphere K has a charge of +4.5 x 10 C, sphere D has a charge of -6.2x10 C, sphere P has a charge of +7.5 x 10 C, and sphere V has a charge of -1.5x10 C. Which two spheres ert the smallest force on each other? a. K and D d. P and D b. K and P e. P and V C. K and V
Transcribed Image Text:7. A student in a lab exerts a 30 N force to pull a block a distance of 36 cm. If a total of 10 J of work is done, the angle between the force and the displacement is a. 89⁰ d. b. 22° e. c. 38° 8. A 100-g sparrow flying at 17.1 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.15 m. b. 1.5 m. C. 15.00 m a. b. c. 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 7.2 x 106 km from the centre of Earth. 9.8 x 10-2 N/kg d. 1.7 x 10³ N/kg 7.6 x 10¹ N/kg e. 5.8 x 105 N/kg 1.7 x 10³ N/kg a. charging by a conductor. b. charging by electricity c. charging by an insulator. + 10. A piece of paper becomes electrically charged when a charged rod of plastic is placed close to it. This is referred to as 20 cm A D 20 cm + 24° none of the above d. e. P T 150 m 1500 m d. charging by contact e. charging by induction 11. Four charged spheres, K, D, P, and V are arranged as shown below. Sphere K has a charge of +4.5 x 10 C, sphere D has a charge of -6.2x10 C, sphere P has a charge of +7.5 x 10 C, and sphere V has a charge of -1.5x10 C. Which two spheres ert the smallest force on each other? a. K and D d. P and D b. K and P e. P and V C. K and V
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