A) a pull only B. B) a push only C) neither a push nor a pull D) a push or pull or both
A) Calorie B) Joules C) Newtons D) Pouds
A) normal B) tension C) magnetic D) friction
A) 500 N B) 50 N C) 250 N D) 1000 N
A) friction B) gravitational C) applied D) tension
A) Applied force and air resistance B) Air resistance only C) Air resistance and gravitational forces D) Gravitational force only
A) Unbalanced forces B) Non-contact forces C) Contact forces D) Balanced forces
A) line of action B) Velocity of the object C) magnitude D) Direction of the force
A) Concrete road B) Muddy road C) Grass D) Sand
A) Alexander Graham Bell B) Isaac Newton C) Thomas Edison D) Aristotle
A) Acceleration B) Inertia C) Action and Reaction D) Gravity
A) Its own inertia B) Friction only C) Its weight D) A net external force
A) Momentum B) Velocity C) Acceleration D) Weight
A) KE = ½ mv² B) F = ma C) P = W/t D) W = Fd
A) No effect B) A stronger push C) A smaller force D) An equal and opposite reaction
A) Do work B) Increase inertia C) Exert force D) Apply mass
A) Velocity and force B) Work and power C) Heat and light D) Kinetic and potential
A) KE = ½ mv² B) KE = Fd C) KE = mgh D) KE = Pt
A) Gravity B) Friction C) The wall pushes back with equal force D) The wall does nothing
A) A 5-kg dog B) A 10-kg box C) A 1-kg rock D) A feather
A) First B) Law of gravitation C) Second D) Third
A) Jumping off a skateboard B) A car accelerating C) Recoil of a gun D) Walking
A) Kinetic B) Potential C) Nuclear D) Chemical
A) Potential B) Work C) Power D) Kinetic
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) Tension B) Normal force C) Gravity D) Friction
A) Gravitational force B) Friction C) Normal force D) Tension
A) Normal force B) Friction C) Weight D) Applied force
A) Magnetic force B) Gravity C) Applied force D) Friction
A) Tension B) Friction C) Normal force D) Gravity
A) Gravity B) Tension force C) Normal force D) Magnetic force
A) Magnetic force B) Normal force C) Gravity D) Electric force
A) Tension B) Normal force C) Gravity D) Friction
A) Gravity B) Normal force C) Friction D) Magnetic force
A) 20 N B) 10 N C) 15 N D) 5 N
A) 20,000 J B) 100,000 J C) 200,000 J D) 400,000 J
A) Red B) Yellow C) Blue D) Violet
A) Microwave B) X-ray C) Infrared D) Ultraviolet
A) Increases B) Stays the same C) Decreases D) Doubles
A) Infrared B) Visible light C) Ultraviolet D) Radio
A) To reduce heat B) To block harmful radiation C) To reflect visible light 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) Radio waves B) Ultraviolet C) Infrared D) Gamma rays
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) Incorrect, because energy disappears in midair B) Correct, because the ball stops moving C) Correct, because gravity cancels all energy D) Incorrect, because it has potential energy at the top
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 force is applied B) Correct, because energy is used C) Correct, because mass is constant D) Incorrect, because no displacement occurs
A) Weighing objects on a scale B) Letting two skaters push off each other C) Measuring speed on a ramp D) Dropping a ball and watching it bounce |