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Work is defined as any external force that either adds or takes away energy from a system. In this scenario, the system is the red football player, and the white football player is the external force that does work on the red player by tackling him in an effort to take away energy from him and slow him down.

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Impulse is defined as the force parallel to a distance times the time that force is applied. The two deers are colliding their antlers head-on and therefore are exerting a force on each other during a certain time, thus creating an impulse.

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The basketball is falling down in the negative direction due to the force of gravity. As it is falling the basketball is also speeding up and therefore has a velocity in the same direction as its acceleration. Since it is moving in the negative direction while speeding up, the ball has negative acceleration.

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The cars exhibit positive acceleration because they are moving forward and speeding up. As they move forward they accelerate in the positive direction, gaining speed, thus having an acceleration and velocity in the same direction.

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Newton's 1st Law states that an object will not change its speed or direction unless an unbalanced force acts upon that object. In this scenario, the motion of the swing ride is circular and constant, and the swings will continue to move in that circular path unless its motion is stopped by an unbalanced force, like the control panel that slows down the ride to a stop.

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Free fall is when any object is freely falling under only the force of gravity. As the football is launched and travels in a parabolic motion, it is in free fall since the only force that propels the ball downwards is gravity.

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The image shows the setup of a simple pendulum, where the ball in the middle can be swung between both posts on either side. This is simple harmonic motion because there is a repetitive back and forth motion of the ball swinging through an equilibrium point, a tension force of the string that causes the motion to be towards equilibrium and proportional to the distance from it, as well as a uniform period.

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As the cowboy applies a force to the lasso to get it to rotate, the cowboy is creating a torque. This torque causes the lasso to move in a circular path with tangential velocity that is changing as the direction of the lasso changes. This rate of change in the tangential velocity is known as the centripetal acceleration.

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An object that has height and is in a system with the earth (gravity) included has potential energy. In this scenario the balls being held up have high potential energy because they have some height given by the acrobats and since they are on earth there is gravity within the system. The balls have the energy to potentially move

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High kinetic energy is achieved when an object is in motion. In this case, the skiers have high kinetic energy as they travel down the snow because they are in constant motion and accelerating downward. This kinetic energy is what enables the skiers to have the energy to keep moving.