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