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