A 12-kg box is pushed with a net horizontal force of 48 N. What is the acceleration of the box?, 2.0 m/s², 4.0 m/s², 6.0 m/s², 8.0 m/s², A 2,000-kg jeepney is pulled by a net force of 8,000 N. What is its acceleration?, 2.0 m/s², 4.0 m/s², 6.0 m/s², 16.0 m/s², Which situation is the best example of Newton’s First Law of Motion?, A basketball falls toward the ground because of gravity., A passenger moves forward when a suddenly stopping jeepney comes to a halt., A heavier box requires a greater net force to produce the same acceleration., A swimmer moves forward by pushing water backward., A 5-kg object is initially at rest. A net force of 20 N acts on it for 4.0 s. What is its final velocity?, 4 m/s, 8 m/s, 16 m/s, 20 m/s, A 10-kg crate rests on a horizontal floor. If the coefficient of static friction is 0.30, what is the maximum possible static friction?, 9.8 N, B. 19.6 N, C. 29.4 N, D. 98.0 N, A box is pulled across a rough floor at constant velocity. Which statement is correct?, The pulling force is greater than friction., Friction is greater than the pulling force., The net horizontal force is zero., The box has no velocity., A block is placed on a frictionless 30°, mg cos 30°, mg sin 30°, mg tan 30°, mg, A 4-kg object moves in a circular path with a radius of 2 m at a speed of 6 m/s. What is its centripetal acceleration?, 3 m/s², 6 m/s², 18 m/s², 36 m/s², The centripetal acceleration of an object moving in a circular path always points:, tangent to the path., away from the center., toward the center., opposite the direction of velocity., A car travels around a circular curve at constant speed. Which statement is true?, Its velocity remains constant., Its acceleration is zero., Its velocity changes because its direction changes., Its speed continuously increases., Why are some highway curves banked or tilted inward?, To decrease the mass of the vehicle., To eliminate gravity., To help provide the centripetal force required for turning., To allow vehicles to ignore the speed limit., Two horizontal forces act on an object: 30 N east and 10 N west. What is the net force?, 20 N east, 20 N west, 40 N east, 40 N west, A 50-N force is applied perpendicular to a wrench at a distance of 0.40 m from its pivot. What torque is produced?, 12.5 N·m, 20 N·m, 50 N·m, 125 N·m, Which equation correctly represents the magnitude of torque?, 𝜏 = 𝑟𝐹 cos 𝜃, 𝜏 = 𝑟𝐹 sin 𝜃, 𝜏 = 𝐹/𝑟, 𝜏 = 𝑟/𝐹, A person pushes directly toward the hinge of a door. What is the torque about the hinge?, Maximum, Half of the maximum, Zero, Infinite, A 100-N force acts at an angle of 60° to a 2.0-m lever arm. What is the torque magnitude?, 50 N·m, 100 N·m, 173 N·m, 200 N·m, A ceiling fan rotates counterclockwise when viewed from below. If the fan is slowing down, in which direction does its angular acceleration vector point?, Upward, Downward, Horizontally toward the left, Radially outward, The angular velocity vector of a rotating object is:, tangent to its circular path., parallel to its axis of rotation., perpendicular to its axis of rotation., always horizontal, A wheel starts from rest and reaches an angular velocity of 30 rad/s in 5 s. What is its angular acceleration?, 5 rad/s², 6 rad/s², 10 rad/s², 15 rad/s², A rotating disk has an initial angular velocity of 4 rad/s and a constant angular acceleration of 3 rad/s². What is its angular velocity after 5 s?, 12 rad/s, 15 rad/s, 19 rad/s, 20 rad/s, A wheel starts from rest and accelerates uniformly at 2 rad/s² for 6 s. Through what angular displacement does it rotate?, 12 rad, 24 rad, 36 rad, 72 rad, A CD rotates at 24 rad/s and slows uniformly to 6 rad/s in 3 s. What is its angular acceleration?, −8 rad/s², −6 rad/s², 6 rad/s², 8 rad/s², For an object to be in complete static equilibrium:, only the net force must be zero., only the net torque must be zero., both net force and net torque must be zero., the object's acceleration must be maximum., A 30-kg child sits 2.0 m from the pivot of a seesaw. Where should a 20-kg child sit on the opposite side to achieve rotational equilibrium?, 1.0 m, 1.5 m, 2.0 m, 3.0 m, A 40-N force is applied perpendicular to a lever arm at a distance of 3.0 m from the pivot. What torque is produced?, 13.3 N·m, 40 N·m, 80 N·m, 120 N·m, A horizontal beam supports a heavy sign. Which condition must be satisfied to prevent the beam from rotating?, The net force must be large., The net torque must be zero., The weight must be greater than the tension., Friction must be zero., A 600-N sign is supported by a cable making an angle of 30° with the horizontal beam. What is the approximate tension in the cable if its vertical component supports the entire weight?, 300 N, 520 N, 1,200 N, 1,732 N, A cable supports a fixed load. To reduce the tension in the cable, while keeping the same attachment point on the load, the cable should generally be:, made flatter., made steeper., removed completely., placed horizontally, Which equation represents Newton’s Law of Universal Gravitation?, If the distance between two masses is doubled while their masses remain constant, the gravitational force becomes:, twice as large., half as large., one-fourth as large., four times as large, If one of two interacting masses is doubled while their separation remains unchanged, the gravitational force becomes:, one-fourth as large., half as large., twice as large., four times as large., A person weighs 600 N on Earth. Another planet has twice Earth's mass and twice Earth's radius. What would the person's weight be on the planet?, 150 N, 300 N, 600 N, 1,200 N, What happens to the acceleration due to gravity as an object moves farther from Earth's surface?, It increases., It decreases., It remains exactly constant., It immediately becomes zero., A satellite is at a distance 2𝑅𝐸from the center of Earth. Compared with an object at Earth's surface, what fraction of the gravitational force acts on the satellite?, 1/2, 1/3, 1/4, 1/8, A hypothetical planet has half the mass of Earth and half the radius of Earth. What is the approximate acceleration due to gravity on its surface?, 2.45 m/s², 4.90 m/s², 9.80 m/s², 19.6 m/s², Two 1,000-kg boulders are separated by 2.0 m. What is the magnitude of the gravitational force between them?, 1.67 × 10^−8N, 1.67 × 10^−5N, 6.67 × 10^−5N, 6.67 × 10^−3N, A 1,000-kg mass falls vertically through a height of 50 m near Earth's surface. What is the magnitude of the decrease in gravitational potential energy?, 4.9 × 10^3J, 4.9 × 10^4J, 4.9 × 10^5J, 4.9 × 10^6J, Which expression represents gravitational potential energy when the zero reference is taken at infinity?, A satellite is moved farther from Earth. What happens to its gravitational potential energy?, It becomes more negative., It becomes less negative., It remains zero., It becomes positive immediately, Which equation correctly gives the escape velocity from a spherical celestial body?, The approximate escape velocity from Earth's surface is:, 7.9 km/s, 9.8 km/s, 11.2 km/s, 15.0 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?, 9.9 m/s, 14.0 m/s, 19.8 m/s, 28.0 m/s, Which expression gives the orbital speed of a satellite in a circular orbit around a massive body?, As a satellite's orbital radius increases, its orbital speed generally:, increases., decreases., remains unchanged., becomes zero immediately, Which equation correctly shows that gravity provides the centripetal force for a circular satellite orbit?, A satellite has a longer orbital period than a low-Earth-orbit satellite. Its orbital radius is generally:, smaller., larger., exactly the same., independent of orbital period, According to Kepler's Third Law, 𝑇^2 ∝ 𝑟^. If a planet's orbital radius becomes 4 times larger, its orbital period becomes:3, 2 times larger., 4 times larger., 8 times larger., 16 times larger., A planet takes 8 years to complete one orbit around its star. Another planet has an orbital radius 4 times greater than the first planet. What is its orbital period?, 16 years, 32 years, 64 years, 128 years, A laboratory apparatus requires exactly 8.0 m of cable. The supplier sells cable in yards. Approximately how many yards should be purchased?, 6.67 yd, 8.75 yd, 9.14 yd, 10.50 yd, The distance between two celestial bodies is 4.5 × 10^8km. Express this distance in Megameters (Mm), 4.5 × 10^2Mm, 4.5 × 10^3Mm, 4.5 × 10^4Mm, 4.5 × 10^5Mm, A vector has a magnitude of 20 m and is directed 60° north of east. What is its x-component?, 5.0 m, 10.0 m, 17.3 m, 20.0 m, A 30-m vector is directed 30∘north of west. What is its y-component?, 15.0 m, 26.0 m, −15.0 m, −26.0 m, A student walks 12 m east and then 5 m north. What is the magnitude of the resultant displacement?, 7 m, 13 m, 17 m, 60 m, For the displacement in Item 53, what is the direction of the resultant vector?, 22.6° north of east, 22.6° east of north, 67.4° north of east, 45.0° north of east, Which situation describes motion with constant velocity?, A car increases its speed by 2 m/s every second., A cyclist continually changes direction while maintaining the same speed., A vehicle travels in a straight line with unchanged speed and direction., A motorcycle slows down at a constant rate., A car starts from rest and accelerates at 4.0 m/s² for 6.0 s. What is its final velocity?, 10 m/s, 20 m/s, 24 m/s, 28 m/s, A runner's velocity changes from 5 m/s to 17 m/s in 4 s. What is the average acceleration?, 2 m/s², 3 m/s², 4 m/s², 5 m/s², A ball is thrown vertically upward with an initial velocity of 19.6 m/s. How long does it take to reach its maximum height?, 1.0 s, 2.0 s, 3.0 s, 4.0 s, A projectile is launched at 20 m/s at an angle of 30∘above the horizontal. What is its horizontal component of velocity?, 5.0 m/s, 10.0 m/s, 17.3 m/s, 20.0 m/s, A projectile is launched at 20 m/s at an angle of 45∘above the horizontal and lands at the same height from which it was launched. What is its approximate horizontal range?, 20.4 m, 30.6 m, 40.8 m, 81.6 m

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