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