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