7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done, the angle between the force and the displacement is a. 89° b. 66° d. 24° e. none of the above c. 61° 8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.315 m b. 0.628 m d. 1.13 m e. 7.72 m c. 0.787 m 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 4.8 x 105 km from the centre of Earth. a. 9.8 × 102 N/kg b. 8.3 x 10' N/kg C. 1.7 × 103 N/kg d. 1.7 x 10³ N/kg e. 9.8 × 105 N/kg 10. A piece of paper becomes electrically charged when a charged rod of plastic is placed close to it. This is referred to as a. charging by a conductor b. charging by induction c. charging by an insulator A P d. charging by contact e. charging by electricity 20 cm Ꭰ T 20 cm 11. Four charged spheres, A, D, P, and T are arranged as shown below. Sphere A has a charge of +4.5 × 10*C, sphere D has a charge of-6.2 x 10 C,sphere Phas a charge of +7.5 x 10 C, and sphere T has a charge of -1.5x 10 C. Which two spheres exert the smallest force on each other? a. A and D b. A and T d. P and D e. P and T c. A and P 3 of 13
7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done, the angle between the force and the displacement is a. 89° b. 66° d. 24° e. none of the above c. 61° 8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.315 m b. 0.628 m d. 1.13 m e. 7.72 m c. 0.787 m 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 4.8 x 105 km from the centre of Earth. a. 9.8 × 102 N/kg b. 8.3 x 10' N/kg C. 1.7 × 103 N/kg d. 1.7 x 10³ N/kg e. 9.8 × 105 N/kg 10. A piece of paper becomes electrically charged when a charged rod of plastic is placed close to it. This is referred to as a. charging by a conductor b. charging by induction c. charging by an insulator A P d. charging by contact e. charging by electricity 20 cm Ꭰ T 20 cm 11. Four charged spheres, A, D, P, and T are arranged as shown below. Sphere A has a charge of +4.5 × 10*C, sphere D has a charge of-6.2 x 10 C,sphere Phas a charge of +7.5 x 10 C, and sphere T has a charge of -1.5x 10 C. Which two spheres exert the smallest force on each other? a. A and D b. A and T d. P and D e. P and T c. A and P 3 of 13
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done,
the angle between the force and the displacement is
a. 89°
b.
66°
d.
24°
e. none of the above
c. 61°
8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The
height that will accomplish this is
a.
0.315 m
b. 0.628 m
d. 1.13 m
e.
7.72 m
c. 0.787 m
9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 4.8 x 105 km from the centre of Earth.
a. 9.8 × 102 N/kg
b. 8.3 x 10' N/kg
C.
1.7 × 103 N/kg
d.
1.7 x 10³ N/kg
e.
9.8 × 105 N/kg
10. A piece of paper becomes electrically charged when a charged rod of plastic is placed close to it. This is
referred to as
a. charging by a conductor
b. charging by induction
c. charging by an insulator
A
P
d. charging by contact
e. charging by electricity
20 cm
Ꭰ
T
20 cm
11. Four charged spheres, A, D, P, and T are arranged as shown below. Sphere A has a charge of +4.5 × 10*C,
sphere D has a charge of-6.2 x 10 C,sphere Phas a charge of +7.5 x 10 C, and sphere T has a charge of
-1.5x 10 C. Which two spheres exert the smallest force on each other?
a. A and D
b.
A and T
d. P and D
e.
P and T
c. A and P
3 of 13
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