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