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