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hi please help me out with those questions and i wiil give u thumbs up Part A: Multiple Choice (12marks) Identify the choice that best
hi please help me out with those questions and i wiil give u thumbs up
Part A: Multiple Choice (12marks) Identify the choice that best completes the statement or answers the question. A hockey puck slides along an ice surface shortly after it has left the hockey stick that propelled it. Which of the following free-body diagrams best represents the hockey puck? FN F14 FA FIX- FAF F d. b. E 2. An elevator is suspended by a cable and moves upward. Which of the following free-body diagrams best represents the forces acting on the elevator? I FN 134 d. D C . Which of the following free-body diagrams best represents the forces acting on an astronaut in orbit around the Earth? D E EN FA# 1 FI FA d. e.4. Study the free-body diagram below and choose the statement that best describes the object's motion. F1 = 2N WADE F1 = 2N4 F3 =4 N 9. A 2.5 x 10' kg car is travelling due west at 30 m/s when the brakes are applied, exerting a force of 5.0 x 10' N [E]. What is the car's acceleration due to the braking? a. 2.0 m/s [W] d. 15 m/s' [B] b. 2.0 m/s' [E] . 2.0 m/s [E] The object will accelerate north. c. 15 m/s [W] b. The object will be motionless. c. The object will accelerate northeast. 10. If the force of gravity that the earth exerts on you is considered to be the action force then, according to d The object will travel with uniform motion. Newton's third law, the corresponding reaction force would be the e The object will travel north with a constant velocity . normal force of the Earth acting upward on you b. force your feet exert downward on the Earth 5. Study the free-body diagram below and choose the statement that best describes the dynamics of the force of gravity you exert on the Earth situation. d. force you exert on your feet, pressing them against the Earth FN = 10 N e. force of gravity the Earth exerts on everything else 11. Which of the following graphs best depicts the relationship between the gravitational force, F, that two masses exert on one another and the distance, d, which separates their centres of mass? Ff - 2N + -FA=8N Fc = 10 N There is no net horizontal force d. The net force acting is 6 N. LELLE b. The net force acting is 30 N. e. The net force acting is 26 N. The net horizontal force is 10 N. D 6. The free-body diagram of a 4.0-kg object is shown below. What additional force must act so that the object has an acceleration of 2.5 m/s [W]? 20N 12. How much would a 60-kg person weigh on the Moon where the gravitational field strength has a magnitude of 1.6 N/kg? 60N a. 60 kg a. 98 N b. 96 kg e. 96 N c. 98 kg 20N 140 N [W] 6.0 N [W] b. 10.0 N [W] e. 4.0 N [W] 8.0 N [W] 7. Which of the following observations is explained by Newton's first law? kicking your feet against something solid to remove snow from your boots b. feeling as though you're being rocked from side-to-side on a roller coaster an apple hanging motionless from the limb of a tree d feeling as though your head jerks backward when pulling away at green light e. all of the above 8. A heavy crate is pushed across a rough surface. The force that is ultimately responsible for the crate's motion is the a. applied force d. net force b. frictional force normal force c. gravitational force
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