7:13 PM Fri May 6 22%% Take Quiz Exit D Question 14 5 pts A scooter and rider are moving along a bumpy road with a coefficient of friction of .81. The mass of the scooter is 35 kg and the rider's mass is 15 kg. What is the force of friction of the scooter and rider? What net force is needed to accelerate the scooter and rider at 5 m/$2 ? If the rider falls off and the same force is applied, what is the new acceleration of the scooter alone? 12pt v Paragraph ~ |B I U A v & V T V Q V BV GV BV7:12 PM Fri May 6 22%% Take Quiz Exit D Question 8 5 pts A ball thrown vertically upward reaches a height of 8.64 meters above the release point of the throw. At the release point, the speed of the ball is approximately_ m/s. Please show your work in order to earn credit for this question. Free Fall Kinematic Equations which may help with this problem. Vf=Vi + 9.8*t d=Vi*t + .5*9.8*+2 Vf2 = Vi2 + 2*9.8*d d= [Vi + Vf]*t/2 12pt V Paragraph B I U A V Q V T V Q V B V BY BV7213 PM Fri May 6 5? 22%9 * Take Quiz Exit D Question 16 5 pts A block of wood is 10 m long, 39 cm wide, and 100 mm high. Can you nd the block's mass when the density is 377 kg/m3? Please report your answer to 1 decimal place. Do not include the units in your answer or the computer will mark the problem wrong. E D Question 17 5 pts The force that allows a substance to oat is ___ 0 normal force 0 gravitational force 0 waterforce O buoyant force D Question 18 5 pts 7:05 PM Fri May 6 22% % Take Quiz Exit D Question 5 5 pts The metric unit for weight force is and the metric unit for force is O kilograms; Newtons Newtons; kilograms O Newtons; pounds O Newtons; Newtons pounds; Newtons D Question 6 5 pts In physics, the two main categories of force are and 12pt V Paragraph B I U A V Q V T V Q V BV BY BV7:13 PM Fri May 6 22%% Take Quiz Exit D Question 20 5 pts A 500 kg weather balloon is designed to lift a 1600 kg package. Remember, Weight = mass * 9.8 and Density = [mass]/[volume of water displaced] 1. What is the total mass of the balloon and the package? 2. What is the weight of the balloon and package together? 3. If the balloon is neutrally buoyant what is the buoyant force on the balloon/package? 4. What is the volume of a helium balloon if the density of helium is 1.2 Kg/L? 12pt V Paragraph B I U A V Q V T V Q V E V BY BV p :2 7 0 words >7:05 PM Fri May 6 '3 22% Efjt Take Quiz Exit D Question 1 5 pts While returning a serve in tennis, the tennis racket exerts a force on the ball. Compared to the force that the racket exerts on the tennis ball, the force that the ball exerts on the tennis racket is ______ 0 zero 0 much larger 0 slightly smaller 0 much smaller 0 slightly larger 0 the same D Question 2 5 pts A 10 kg block experiences two external forces acting on it simultaneously. Force A has a magnitude of 73 N and points in the positive direction. Force B has a magnitude of 16 N and points in the negative direction. What is the net force acting on the block? Do not type in the unit or the computer will mark your answer incorrect. Report your answer to 1 decimal place. 7:07 PM Fri May 6 '3 22%@ . Take Quiz Exi D Question 2 5 pts A 10 kg block experiences two external forces acting on it simultaneously. Force A has a magnitude of 73 N and points in the positive direction. Force B has a magnitude of 16 N and points in the negative direction. What is the net force acng on the block? Do not type in the unit or the computer will mark your answer incorrect. Report your answer to 1 decimal place. E D Question 3 5 pts A 9 kg block experiences two external forces acting on it simultaneously. Force A has a magnitude of 15 N and points in the positive direction. Force B has a magnitude of 2 N and points in the negative direction. What is the acceleration of the block? Report your answer to 1 decimal place. Do not type in the unit or the computer will mark your answer incorrect. E [3 nllncHnn /i E n+c 7:12 PM Fri May 6 '3 22% Efjt Take Quiz Exit D Question 9 5 pts ( Two objects are released from a height near the surface of the Earth. Object A has a mass of m and Object B has a mass of 3m. After - seconds of free fall, Object A has reached a speed of v and has traveled a distance d. After - seconds of free fall, the speed and distance of Object B are 0 speed : V/3 ; distance : d/3 0 speed : V/3 ; distance : 3d 0 speed = 3v; distance = (1/3 0 speed : v ; distance : d D Question 10 5 pts A block has two forces acting on it simultaneously. F1 is pushing the block to the east. F2 is pushing the block to the west. If F1 is larger than F2, then the block is ______ 0 moving at a constant speed to the west. 0 accelerating t0 the east. 0 accelerating to the west. 0 moving at a constant speed to the east. 7:12 PM Fri May 6 22% % Take Quiz Exit D Question 7 5 pts Imagine you jump out of an airplane and wait 3.8 seconds before pulling the parachute. a. How fast are you going when you pull the chute? b. How far have you fallen before you pull the chute? To earn credit, you must show all of your work. 12pt V Paragraph " B I U A v & V T V Q V B V G. V BV p O words > >7213 PM Fri May 6 5? 22%9 * Take Quiz Exit D Question 18 5 pts If an object's weight is less than its buoyant force, the object will ______ 0 oat O sink 0 suspend under water D Question 19 5 pts If the density of the object is greater than the density of the uid, the force of gravity will be stronger than the buoyant force and the object will ______ O sink 0 oat 0 move back and forth D Question 20 5 pts 7:12 PM Fri May 6 '3 22%@ . Take Quiz Exit D Question 11 5 pts ( When a man stands on a bathroom scale in a stationary elevator, the scale registers a force of 825 N. When the elevator is accelerating downward, the scale will register a force that is 0 less than 825 N O greater than 825 N 0 equal to 825 N 0 not enough information D Question 12 5 pts A child pulls a 14.2 kg wagon across a level oor, causing it to accelerate at 7 m/s2. If the force of friction between the wheels and the wagon is 9.7 N, what is the force applied by the child? Report your answer to one decimal place. Do not include the units in your answer or the computer will mark the problem wrong. E D Question 13 5 pts 7:05 PM Fri May 6 "3 22%@ . Take Quiz Exit D Question 3 5 pts A 9 kg block experiences two external forces acting on it simultaneously. Force A has a magnitude of 15 N and points in the positive direction. Force B has a magnitude of 2 N and points in the negative direction. What is the acceleration of the block? Report your answer to 1 decimal place. Do not type in the unit or the computer will mark your answer incorrect. E D Question 4 5 pts ________________ is the force of gravity acting upon the mass of an object E D Question 5 5 pts The metric unit for weight force is _______ and the metric unit for force is ____ 7:13 PM Fri May 6 22%% Take Quiz Exit D Question 13 5 pts Imagine you build a model rocket with a mass of .75 kg. When launched, the engine produces a net force of 9.3 N. What is the rocket's acceleration? 12pt V Paragraph B I U A V Q V T V Q V B V BY BV p O words > > D Question 14 5 pts