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