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