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