A) a push or pull or both B) a pull only B. C) neither a push nor a pull D) a push only
A) Pouds B) Newtons C) Joules D) Calorie
A) magnetic B) friction C) tension D) normal
A) 500 N B) 250 N C) 50 N D) 1000 N
A) gravitational B) applied C) tension D) friction
A) Applied force and air resistance B) Air resistance only C) Gravitational force only D) Air resistance and gravitational forces
A) Non-contact forces B) Unbalanced forces C) Balanced forces D) Contact forces
A) magnitude B) line of action C) Direction of the force D) Velocity of the object
A) Concrete road B) Grass C) Sand D) Muddy road
A) Isaac Newton B) Aristotle C) Alexander Graham Bell D) Thomas Edison
A) Action and Reaction B) Acceleration C) Inertia D) Gravity
A) A net external force B) Friction only C) Its weight D) Its own inertia
A) Velocity B) Acceleration C) Weight D) Momentum
A) W = Fd B) P = W/t C) F = ma D) KE = ½ mv²
A) A stronger push B) A smaller force C) An equal and opposite reaction D) No effect
A) Exert force B) Do work C) Increase inertia D) Apply mass
A) Velocity and force B) Kinetic and potential C) Heat and light D) Work and power
A) KE = mgh B) KE = Fd C) KE = Pt D) KE = ½ mv²
A) The wall does nothing B) Gravity C) The wall pushes back with equal force D) Friction
A) A 5-kg dog B) A 10-kg box C) A 1-kg rock D) A feather
A) First B) Third C) Law of gravitation D) Second
A) Recoil of a gun B) A car accelerating C) Walking D) Jumping off a skateboard
A) Chemical B) Potential C) Kinetic D) Nuclear
A) Kinetic B) Power C) Work D) Potential
A) Water behind a dam B) A ball at rest on a table C) A moving car D) A stretched bow
A) Kinetic → potential B) Potential → kinetic C) Work → power D) Power → potential
A) Tension B) Gravity C) Normal force D) Friction
A) Gravitational force B) Normal force C) Friction D) Tension
A) Normal force B) Weight C) Friction D) Applied force
A) Gravity B) Magnetic force C) Friction D) Applied force
A) Friction B) Tension C) Gravity D) Normal force
A) Normal force B) Magnetic force C) Tension force D) Gravity
A) Normal force B) Magnetic force C) Electric force D) Gravity
A) Friction B) Tension C) Normal force D) Gravity
A) Friction B) Normal force C) Gravity D) Magnetic force
A) 5 N B) 20 N C) 10 N D) 15 N
A) 200,000 J B) 100,000 J C) 400,000 J D) 20,000 J
A) Red B) Yellow C) Violet D) Blue
A) Microwave B) Infrared C) X-ray D) Ultraviolet
A) Doubles B) Decreases C) Increases D) Stays the same
A) Ultraviolet B) Infrared C) Visible light D) Radio
A) To reflect visible light B) To block harmful radiation C) To reduce heat D) To block sound
A) Gamma rays B) Ultraviolet C) Microwaves D) Infrared
A) Television broadcasts B) Microwave ovens C) Ultraviolet lamps D) MRI scanning
A) Ultraviolet B) Radio waves C) Infrared D) Gamma rays
A) Using radio waves for broadcasting signals B) Using ultraviolet light for Wi-Fi C) Using gamma rays in mobile phones D) Using X-rays for satellite internet
A) Incorrect, because energy disappears in midair B) Correct, because the ball stops moving C) Incorrect, because it has potential energy at the top D) Correct, because gravity cancels all energy
A) Shine light on both objects B) Drop a feather and stone at the same time without air resistance C) Push both objects on a table D) Use a balance to measure weight
A) Correct, because force is applied B) Incorrect, because no displacement occurs C) Correct, because mass is constant D) Correct, because energy is used
A) Measuring speed on a ramp B) Weighing objects on a scale C) Dropping a ball and watching it bounce D) Letting two skaters push off each other |