A) a push only B) a push or pull or both C) neither a push nor a pull D) a pull only B.
A) Calorie B) Pouds C) Joules D) Newtons
A) tension B) normal C) magnetic D) friction
A) 50 N B) 250 N C) 500 N D) 1000 N
A) tension B) gravitational C) applied D) friction
A) Applied force and air resistance B) Air resistance and gravitational forces C) Gravitational force only D) Air resistance only
A) Non-contact forces B) Contact forces C) Unbalanced forces D) Balanced forces
A) line of action B) Direction of the force C) magnitude D) Velocity of the object
A) Muddy road B) Sand C) Grass D) Concrete road
A) Alexander Graham Bell B) Isaac Newton C) Thomas Edison D) Aristotle
A) Acceleration B) Inertia C) Gravity D) Action and Reaction
A) Friction only B) Its own inertia C) A net external force D) Its weight
A) Acceleration B) Velocity C) Momentum D) Weight
A) W = Fd B) KE = ½ mv² C) P = W/t D) F = ma
A) No effect B) An equal and opposite reaction C) A stronger push D) A smaller force
A) Exert force B) Apply mass C) Increase inertia D) Do work
A) Work and power B) Kinetic and potential C) Heat and light D) Velocity and force
A) KE = Fd B) KE = mgh C) KE = ½ mv² D) KE = Pt
A) The wall does nothing B) Gravity C) The wall pushes back with equal force D) Friction
A) A 5-kg dog B) A feather C) A 10-kg box D) A 1-kg rock
A) Third B) Second C) First D) Law of gravitation
A) Walking B) A car accelerating C) Jumping off a skateboard D) Recoil of a gun
A) Nuclear B) Chemical C) Kinetic D) Potential
A) Kinetic B) Work C) Power D) Potential
A) A stretched bow B) A ball at rest on a table C) A moving car D) Water behind a dam
A) Power → potential B) Work → power C) Kinetic → potential D) Potential → kinetic
A) Tension B) Normal force C) Gravity D) Friction
A) Gravitational force B) Tension C) Friction D) Normal force
A) Applied force B) Normal force C) Weight D) Friction
A) Friction B) Magnetic force C) Applied force D) Gravity
A) Normal force B) Friction C) Gravity D) Tension
A) Normal force B) Gravity C) Magnetic force D) Tension force
A) Gravity B) Electric force C) Normal force D) Magnetic force
A) Friction B) Gravity C) Normal force D) Tension
A) Gravity B) Friction C) Magnetic force D) Normal force
A) 20 N B) 5 N C) 10 N D) 15 N
A) 100,000 J B) 400,000 J C) 200,000 J D) 20,000 J
A) Red B) Blue C) Yellow D) Violet
A) Infrared B) X-ray C) Microwave D) Ultraviolet
A) Doubles B) Increases C) Stays the same D) Decreases
A) Radio B) Visible light C) Infrared D) Ultraviolet
A) To reflect visible light B) To block harmful radiation C) To reduce heat D) To block sound
A) Microwaves B) Ultraviolet C) Infrared D) Gamma rays
A) Ultraviolet lamps B) MRI scanning C) Microwave ovens D) Television broadcasts
A) Radio waves B) Gamma rays C) Infrared D) Ultraviolet
A) Using radio waves for broadcasting signals B) Using X-rays for satellite internet C) Using ultraviolet light for Wi-Fi D) Using gamma rays in mobile phones
A) Correct, because gravity cancels all energy B) Correct, because the ball stops moving C) Incorrect, because energy disappears in midair D) Incorrect, because it has potential energy at the top
A) Push both objects on a table B) Shine light on both objects 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) Incorrect, because no displacement occurs D) Correct, because mass is constant
A) Weighing objects on a scale B) Letting two skaters push off each other C) Dropping a ball and watching it bounce D) Measuring speed on a ramp |