A 12-kg box is pushed with a net horizontal force of 48 N. What is the acceleration?, 6 m/s², 8 m/s², 4 m/s², 2 m/s², A 2,000-kg jeepney is pulled with a net force of 8,000 N. What is its acceleration?, 16 m/s², 8 m/s², 2 m/s², 4 m/s², Which situation best illustrates Newton's First Law?, Passenger moves forward, Rocket launches upward, Ball falls down, A car speeds up, A 5-kg object is initially at rest. A net force of 20 N acts on it for 4 seconds. What is its final velocity?, 12 m/s, 16 m/s, 8 m/s, 20 m/s, A 10-kg crate rests on a horizontal floor. The coefficient of static friction is 0.30. What is the maximum static friction?, 19.6 N, 49 N, 9.8 N, 29.4 N, A box is pulled across a rough floor at constant velocity. Which statement is correct?, Friction is zero, Net force is zero, Force is increasing, Acceleration is positive, A block is placed on a 30° frictionless incline. Which component of its weight acts parallel to the incline?, mg sin 30°, mg tan 30°, mg cos 30°, mg, A 4-kg object moves in a circular path of radius 2 m with a speed of 6 m/s. What is its centripetal acceleration?, 12 m/s², 24 m/s², 18 m/s², 9 m/s², The direction of centripetal acceleration is always:, Upward only, Tangent path, Toward center, Away center, A car travels around a circular curve at constant speed. Which quantity is changing?, Velocity, Mass, Speed, Radius, Why are highway curves often banked?, Increase friction, Provide centripetal force, Lower speed, Reduce weight, Two forces act on an object: 30 N east and 10 N west. What is the net force?, 40 N east, 0 N, 20 N west, 20 N east, A 50-N force is applied perpendicular to a wrench 0.4 m from the pivot. What torque is produced?, 25 N·m, 10 N·m, 40 N·m, 20 N·m, Which equation correctly gives the magnitude of torque?, τ = rF sin θ, τ = F/r, τ = rF cos θ, τ = mr², A person pushes a door exactly toward its hinges. What is the torque about the hinges?, Negative, Maximum, Zero, Positive, A 100-N force acts at an angle of 60° to a 2-m lever arm. What is the torque?, 200 N·m, 173 N·m, 100 N·m, 150 N·m, A fan rotates counterclockwise when viewed from below. If the fan is slowing down, the angular acceleration vector points:, Outward, Clockwise, Upward, Downward, The angular velocity vector of a rotating object is:, Perpendicular force, Toward center, Tangent path, Parallel to axis, A wheel starts from rest and reaches 30 rad/s in 5 s. What is its angular acceleration?, 6 rad/s², 7.5 rad/s², 5 rad/s², 10 rad/s², A rotating disk has an initial angular velocity of 4 rad/s and angular acceleration of 3 rad/s². What is its angular velocity after 5 s?, 17 rad/s, 19 rad/s, 15 rad/s, 21 rad/s, A wheel starts from rest and accelerates uniformly at 2 rad/s² for 6 s. What is its angular displacement?, 24 rad, 30 rad, 42 rad, 36 rad, A CD rotates at 24 rad/s and slows uniformly to 6 rad/s in 3 seconds. What is its angular acceleration?, -6 rad/s², 6 rad/s², -3 rad/s², 18 rad/s², For an object to be in complete static equilibrium:, Speed is constant, Net torque only, Both are zero, Net force only, A 30-kg child sits 2 m from the pivot. Where should a 20-kg child sit to balance the seesaw?, 1.5 m, 3.0 m, 2.0 m, 2.5 m, A 40-N force is applied 3 m from a pivot perpendicular to the lever arm. What torque does it produce?, 80 N·m, 120 N·m, 100 N·m, 160 N·m, A horizontal beam supports a heavy sign. Which condition is necessary to prevent the beam from rotating?, Friction removed, Net force zero, Mass increases, Net torque zero, A 600-N sign is supported by a cable that makes a 30° angle with a horizontal beam. Compared with the sign's weight, the cable tension must generally be:, Zero, Equal to 600 N, Greater than 600 N, Less than 600 N, To reduce the tension in the cable supporting a horizontal sign, the cable should generally be:, Made steeper, Made heavier, Made flatter, Made longer, Which equation represents Newton's Law of Universal Gravitation?, v = √gr, F = ma, U = mgh, F = Gm₁m₂/r², If the distance between two masses is doubled, what happens to the gravitational force?, One-fourth, Halves, Doubles, Unchanged, If one mass is doubled while distance remains unchanged, what happens to gravitational force?, Unchanged, Twice as large, Halved, Four times, A person weighs 600 N on Earth. A planet has twice Earth's mass and twice Earth's radius. What is the person's weight there?, 600 N, 150 N, 300 N, 1200 N, What happens to acceleration due to gravity as altitude increases?, It decreases, It becomes zero, It increases, It is constant, A satellite is at 2Rₑ from Earth's center. How does Earth's gravitational force compare with the force at Earth's surface?, Half as large, Same force, 1/4 as large, Twice as large, A hypothetical planet has half Earth's mass and half Earth's radius. What is its surface gravity?, 9.8 m/s², 19.6 m/s², 14.7 m/s², 4.9 m/s², Two 1,000-kg masses are separated by 2 m. What is the gravitational force?, 1.00 × 10⁻⁴ N, 6.67 × 10⁻⁵ N, 1.67 × 10⁻⁶ N, 1.67 × 10⁻⁵ N, A 1,000-kg mass falls 50 m. What is the magnitude of the decrease in gravitational potential energy?, 9.8 × 10⁴ J, 9.8 × 10⁵ J, 4.9 × 10⁵ J, 4.9 × 10⁴ J, Which expression represents gravitational potential energy when zero is defined at infinity?, U = -GMm/r, U = GMm/r, U = 1/2mv², U = mgh, A satellite is moved farther from Earth. What happens to its gravitational potential energy?, More negative, Less negative, Becomes zero always, Stays constant, Which equation gives escape velocity?, v = gr, v = at, v = √GM/r, vₑ = √(2GM/R), What is Earth's approximate escape velocity?, 15.0 km/s, 7.9 km/s, 11.2 km/s, 9.8 km/s, An object starts from rest at a height of 20 m and slides down a frictionless track. What is its theoretical speed at the bottom?, 19.8 m/s, 14.0 m/s, 24.0 m/s, 28.0 m/s, The orbital speed of a satellite in a circular orbit is:, v = √(2GM/R), v = √(GM/r), v = gr, v = 2πr, As orbital radius increases, what happens to orbital speed?, Increases, Becomes zero, Unchanged, Decreases, Which equation correctly describes a circular satellite orbit?, ma = mg, U = -GMm/r, F = kx, mv²/r = GMm/r², A satellite orbits Earth once every 24 hours. Compared with a low-Earth-orbit satellite, its orbital radius is generally:, Zero, Larger, Smaller, Equal, If a planet's orbital radius becomes 4 times larger, how does its orbital period change?, 4 times larger, 2 times larger, 8 times larger, 16 times larger, A planet takes 8 years to orbit its star. Another planet has an orbital radius 4 times larger. What is its orbital period?, 64 years, 128 years, 32 years, 16 years, A laboratory apparatus requires 8 meters of cable. Approximately how many yards is this?, 7.25 yd, 9.50 yd, 10.25 yd, 8.75 yd, The distance between two celestial bodies is 4.5 × 10⁸ km. Express this in megameters., 4.5 × 10⁵ Mm, 4.5 × 10⁸ Mm, 4.5 × 10⁴ Mm, 4.5 × 10⁶ Mm, A vector has a magnitude of 20 m and points 60° north of east. What is its x-component?, 17.3 m, 20 m, 10 m, 5 m, A 30-m vector points 30° north of west. What is its y-component?, 30 m, 15 m, 26 m, 20 m, A student walks 12 m east and then 5 m north. What is the magnitude of the resultant displacement?, 13 m, 15 m, 11 m, 17 m, For the displacement in Item 53, what is its direction?, 67.4° north of east, 22.6° east of north, 22.6° north of east, 45° north of east, Which statement describes constant velocity?, Acceleration is positive, Direction changes only, Speed changes only, Speed and direction remain constant, A car starts from rest and accelerates at 4 m/s² for 6 s. What is its final velocity?, 22 m/s, 24 m/s, 28 m/s, 20 m/s, A runner's velocity changes from 5 m/s to 17 m/s in 4 s. What is the acceleration?, 2 m/s², 5 m/s², 3 m/s², 4 m/s², A ball is thrown vertically upward with an initial velocity of 19.6 m/s. How long does it take to reach maximum height?, 2 s, 3 s, 1 s, 4 s, A projectile is launched at 20 m/s at 30° above the horizontal. What is its horizontal component of velocity?, 14.1 m/s, 10.0 m/s, 20.0 m/s, 17.3 m/s, A projectile is launched at 20 m/s at 45° and lands at the same height. What is its approximate horizontal range?, 28.3 m, 40.8 m, 56.6 m, 20.4 m

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