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### 25 Cards in this Set

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 What is the gravitational potential energy of a 3-kg object 8 m above the ground? A) 24 J B) 36 J C) 96 J D) 235 J 235 J Law of Conservation of Momentum: States that if no outside forces act on a group of objects, the momentum of the group will not change. Which of the following is not conserved ? A) Mass B) Acceleration C) Energy D) Momentum Acceleration Velocity: Rate of change of displacement; includes both speed and direction. Where is the kinetic energy of a falling object greatest? A) Top of fall B) Bottom of fall C) Middle of fall D) It doesn't change B) Bottom of fall Law of Conservation of energy: States that energy cannot be destroyed or created, but it is only transformed from one form to another. What is the momentum of an object with mass 50 kg moving at 20 km/h ? A) 1000 kg X km/h B) 2000 kg X km/h C) 5000 kg X km/h D) 20 000 kg X km/h A) 1000 kg X km/h Speed: Rate of Change of an object's position. Velocity: Rate of change of displacement; includes both speed and direction. When an object accelerates, what can it do? A) Speed up B) Slow down C) Change Direction D All of the above D) all of the above Displacement: Measures the change in position of an object, using the starting point and ending point and noting the direction. What is the kinetic energy of a 60-kg diver falling at 10 m/s ? A) 300 J B) 600 J C) 3000 J D) 5880 J 3000 J Speed: Rate of change of an object's position. Gravitational Potential Energy: Energy an object could potentially gain if it falls, depending on its mass and the height it can fall. Kinetic Energy: Energy an object has due to its motion; depends on the object's mass and velocity. Energy of motion; is influenced by an object's mass and speed and can be transferred from one object to another when objects collide. What is the rate of change of velocity called? A) Momentum B) Mass C) Acceleration D) Force C) Acceleration Mass: Quantity of matter in an object and a measure of the object's inertia; unit is the kilogram, (kg.). Momentum: Product of mass and velocity; quantity of motion for an object. Energy: The ability to cause change; can affect the temperature, speed, shape, or direction of an object. The ability to cause change; cannot be destroyed or created, only transferred from one form to another. What is a possible unit of momentum? A) kb B) kg X m C) kg X m/s squared D) kg X m/s A) kg Inertia: Measures an object's tendency to remain at rest or to stay in constant motion. What is the rate of change of position? A) Velocity B) Acceleration C) Displacement D) Momentum A) Velocity Acceleration: Rate of change of velocity; can act in the direction of motion, at an angel, or opposite to the direction of motion. Velocity: Rate of change of displacement; includes both speed and direction. When no outside forces act on a system of objects, what do the objects do ? A) Conserve momentum B) Do not conserve momentum C) Come to rest D) Continue with the same velocity A) Conserve Momentum