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