10. A brick has a mass of 2 kilograms. What is the weight of the of a. 2N- b. 0.
ID: 1795238 • Letter: 1
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10. A brick has a mass of 2 kilograms. What is the weight of the of a. 2N- b. 0.2 N c. 200N d. 2ON 11. A constant force of 3.ON Is applied to a mass of 6.0 kg in deep space, far away from the gravitational influence of any star or planet. What is the magnitude of the a. 2 m/s acceleration? b. 9.8 m/s c. 0.5 m/s d. 18 m/s 12. Work is done when a net force is applied to a. True an object over a certain distance. b. False 13. If a person does 50J of work in moving a 30kg box over a 10m dist ance on a horizontal surface, what is the minimum force required? a. 0.2 N b. 1.66N c. 3 N d. 5N kg block is released from rest 80m above the ground. When it has fallen 50 meters it's potential energy is approximately: a. 4800 J b. 3500J C. 2940 J d. 17643 e 15. A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. Determine the potential energy possessed by the skydiver. a. 6.7x105J b. 1.5x10 c. 4.2x10 d. 8.1x10 16. The collision of two pool balls is approximately what kind of collision? Inelastic Depends on the nature of the collision a. b. Elastic c. Completely inelastic a. 17. You tie a rock to a string and whirl it in a horizontal circle. The string breaks. In the absence of gravity, the rock... a. Travels in a circle Flies in a straight line vertically up into the air Travels in a straight line horizontally away from you b. C) d. Explodes 18. In a transverse wave, the particles in the medium move in a direction perpendicular to the dire of the wave. a. True b. False 400Hz. What will its frequency be i its wav 19. The frequency produced by a vibrating string is doubled? a. 100 Hz c. 200 Hz d. 800 Hz b. 600 Hz tring is 600 Hz is moving at 330m/s. What is its d. 0.22 m c. 1500 m a. 0.55 m b. 4.95 x 105 m C During one of the labs you measure the value of gravity to be 9.76m/s' but the actual 9.81m/s. What is the percent error? a. 0.005% d. 5% e..0: c. 0.5% 0.05%Explanation / Answer
10] weight = mg = 2*10 = 20 N
11] a= F/m = 3/6 = 0.5 m/s^2
12] False, uniform circular motion is example
13] Fmin = W/s = 50/10 = 5 N
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