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a ball rolls down a ramp, starting from rest, after 4 seconds, it’s velocity is 12m/s. what is the acceleration of the ball?
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Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults
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Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?
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Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?
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Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.
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a ball rolls down a ramp, starting from rest, after 4 seconds, it’s velocity is 12m/s. what is the a...
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