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