A) neither a push nor a pull B) a push only C) a pull only B. D) a push or pull or both
A) Newtons B) Joules C) Pouds D) Calorie
A) normal B) tension C) friction D) magnetic
A) 500 N B) 50 N C) 1000 N D) 250 N
A) gravitational B) tension C) friction D) applied
A) Air resistance and gravitational forces B) Applied force and air resistance C) Gravitational force only D) Air resistance only
A) Non-contact forces B) Unbalanced forces C) Balanced forces D) Contact forces
A) magnitude B) Direction of the force C) line of action D) Velocity of the object
A) Concrete road B) Sand C) Grass D) Muddy road
A) Aristotle B) Thomas Edison C) Isaac Newton D) Alexander Graham Bell
A) Acceleration B) Action and Reaction C) Gravity D) Inertia
A) A net external force B) Friction only C) Its own inertia D) Its weight
A) Acceleration B) Weight C) Velocity D) Momentum
A) KE = ½ mv² B) W = Fd C) P = W/t D) F = ma
A) A smaller force B) A stronger push C) An equal and opposite reaction D) No effect
A) Apply mass B) Increase inertia C) Exert force D) Do work
A) Velocity and force B) Heat and light C) Work and power D) Kinetic and potential
A) KE = ½ mv² B) KE = mgh C) KE = Fd D) KE = Pt
A) Friction B) Gravity C) The wall pushes back with equal force 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) A car accelerating B) Jumping off a skateboard C) Recoil of a gun D) Walking
A) Chemical B) Nuclear C) Potential D) Kinetic
A) Potential B) Power C) Kinetic D) Work
A) A stretched bow B) Water behind a dam C) A ball at rest on a table D) A moving car
A) Kinetic → potential B) Potential → kinetic C) Work → power D) Power → potential
A) Normal force B) Gravity C) Tension D) Friction
A) Tension B) Normal force C) Gravitational force D) Friction
A) Normal force B) Applied force C) Weight 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) Normal force C) Gravity D) Tension force
A) Magnetic force B) Electric force C) Normal force D) Gravity
A) Gravity B) Normal force C) Friction D) Tension
A) Gravity B) Normal force C) Magnetic force D) Friction
A) 15 N B) 10 N C) 5 N D) 20 N
A) 400,000 J B) 200,000 J C) 20,000 J D) 100,000 J
A) Violet B) Blue C) Yellow D) Red
A) X-ray B) Microwave C) Ultraviolet D) Infrared
A) Decreases B) Stays the same C) Doubles D) Increases
A) Ultraviolet B) Infrared C) Visible light D) Radio
A) To reflect visible light B) To block sound C) To block harmful radiation D) To reduce heat
A) Infrared B) Ultraviolet C) Microwaves D) Gamma rays
A) MRI scanning B) Television broadcasts C) Ultraviolet lamps D) Microwave ovens
A) Infrared B) Gamma rays C) Radio waves D) Ultraviolet
A) Using ultraviolet light for Wi-Fi B) Using X-rays for satellite internet C) Using radio waves for broadcasting signals D) Using gamma rays in mobile phones
A) Incorrect, because it has potential energy at the top B) Correct, because the ball stops moving C) Incorrect, because energy disappears in midair D) Correct, because gravity cancels all energy
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 force is applied B) Correct, because mass is constant C) Incorrect, because no displacement occurs D) Correct, because energy is used
A) Measuring speed on a ramp B) Weighing objects on a scale C) Dropping a ball and watching it bounce D) Letting two skaters push off each other |