10. A child standing on a bus remains still when the bus is at rest. When the bus moves forward and then slows down, the child continues moving forward at the original speed. This is an example of OA. Newton's First Law of Motion. OB. an action-reaction pair. C. Newton's Third Law of Motion. OD. Newton's Second Law of Motion.

A bus is moving with constant velocity. Suddenly the bus stops. Passengers will tend to move.BackwardForwardUnaffectedRise upward

A car is standing 200 m behind a bus, which is also at rest.The two start moving at the same instant but with differ-ent forward accelerations. The bus has acceleration 2 m/s2and the car has acceleration 4 m/s2. The car will catch upwith the bus after a time of

The second law of motion states that1 pointto every action there is an equal and opposite reactiona body will continue to be at rest or in motion unless and external force is applied to itif the external force acting on a system of bodies is zero, then the momentum of the system remains constantthe force applied to an object is directly proportional to the mass of the object and the acceleration.

34-This graph to the right represents............... A-Body at rest. B-Body moves with uniform speed C-Deceleration D-None of the above 35-When a car applies brakes,passengers get pushed forward, This is an example of ................................ A-Newton's first law B-Newton's second law C--Newton's third law D-None of the above 36-Ariel dropped a golf ball from her second story window. The ball starts from rest and hits the sidewalk 2 seconds later with a velocity of 10 m/s. Find the acceleration of the golf ball. A-5 m/s2 B-10 m/s2 C-2 m/s2 D-0 m/s2 37-10 km to the west is .................. A-displacement B-distance C-acceleration D-velocity 38-If a circuit has a resistance of 5 ohms and current of 3 amperes, What is the voltage? A-15 V B-1.6 V C-8 V D-2 V 39-A man walks 20 km in 4 hours. Find his speed. A-5 Km/h B-80 Km/h C-16 Km/s D-24 Km/h 40- The device used to measure the electric current intensity (I) is......................... A-Ammeter B-Voltmeter C-Ohmmeter D-None of the above 41-A waves has a frequency of 50Hz wavelength of 10 m. What is the speed of the wave? A-500 m/s B-5 m/s C-40 m/sD-60 m/s 42- The unit of the voltage is ............. A-Volts B-Ohms C-Ampere D-Voltmeter 43-..............is an electric current which periodically reverses direction and changes its magnitude continuously with time . A-Alternating current (A.C) B-Direct current (D.C) C-Static current D-None of the above 44-The stored energy in an object is..........energy A-potential B-kinetic C-thermal D-chemical 45-In transverse waves , the vibrations are ...................to the direction of the wave . A-Perpendicular B-Right angle ( 90 degree) C-Parallel D-a and b are correct 46-In longitudinal waves , the vibrations are ...............to the direction of wave travel. A-Parallel B-Perpendicular C-Right angle D-None of the above 47-Which electromagnetic waves are used to detect the broken bones ? A-X-ray B-Gamma ray C-Infrared D-Ultraviolet 48- This picture to the right is the symbol of the ..........in the electric circuit. A-battery B-ammeter C-voltmeter D-lamp (bulb) 49-The heat energy transfer from the..............object to the................object. A-hot- cold B-cold-hotC-hot- hot D-cold- cold 50-In ....... Electric circuit when you turn off on lamp the rest will turn off A-Series B-Parallel C--a and b are correct D-None of the above 51-In this diagram, Point D is ......... A-amplitude B-wavelength C-trough D-crest 52-In this diagram, Point A is the............ A-amplitude B-wavelength C-trough D-crest 53-In this diagram, Point C is ....... A-amplitude B--wavelength C-trough D-crest 54-In this diagram, Point B is the............ A-amplitude B-wavelength C-trough D-crest 55-All electromagnetic waves .................... A-are transverse waves B-Can travel through vacuum(space) C-are longitudinal waves D-a and b are correct answers 56- The heat energy transfer through liquids and gas by...................... A-Conduction B-Convection C-Radiation D-None of the above 57-The heat energy transfer through space by .................. A-Conduction B-Convection C-Radiation D-None of the above58-The mechanical energy is the sum of..........energy and...........energy. A-potential and kinetic B-potential and heat C-potential and chemical D-kinetic and heat 59-Which electromagnetic wave has the lowest energy, frequency and longest wavelength ? A-Radio Waves B-gamma rays C-Ultraviolet D-infrared 60-Pushing a cart is an example of Newton's .........law A-first B-second C-third D-none of the above 61-Sounds can travel faster in .............. A-solids B-Liquids C-Gass D-None of the above 62- As the height increases, The.................energy increases . A-potential B-kinetic C-heat D- chemical 63-In Newton's second law, Force = .......X ....... A-mass x acceleration B-mass x volume C-mass x height D-speed 64-In a natural gas stove , the ......energy changes to ........energy. A-chemical to heat B-heat to chemical C-electric to heat D-Kinetic to heat 65-..................have high sound pitch. A-Girls and Birds B-Boys and Lions C-Girls and Lions D-Dogs and Boys 66-What is this circuit? A-Open circuit B-Closed circuit C-Parallel circuitD-None of the above 67-An object moves from point P to Q to R to S and finally returns to Point P . The Displacement is .......... A-0 km B-2 km C-7 km D-5 km 68-The Electromagnetic wave provides us with vitamin D is...... A-Ultraviolet B-gamma rays C-Radio Waves D-infrared 69-............ electric charges repel each other. A-Like B-unlike C-different D- none of the above 70-The longitudinal waves consist of..............and.............. A-compressions and rarefactions B-compressions and crests C-crests and troughs D-rarefactions and troughs

A train is moving at a constant speed on a straight track. You are standing in one of the carriages. The train brakes suddenly and you seem to be thrown forwards.Use Newton's first law to explain why.