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Which could potentially reason you the greater injury; being tackled by a light-weight, fast-moving football player, or being tackled by a player with double the mass however moving at half the speed?
a .5-kg object is attached to a spring of spring constant 30 nm and released from rest at t0 from a position .25 m from
A 5.0-kg projectile is fired over level ground with a velocity of 200.0 m/s at an angle of 30.0 degg above the horizontal. Over the entire trip the work done by the air forces is
An object of mass 1.9 kg starts from rest and slides down an inclined plane 80 cm long in 0.46 s
A research group plans to construct an engine that extracts energyfrom the ocean, what is the maximum efficiency such anengine could have
A proton has an initial speed of 3.3*10^5, What potential difference is required to reduce the initial speed of the proton by a factor of two
a given motorcycle has a mass of 235 kg. when driven in a circular pah with a radius of 25.0 m the centripetal force
A horizontal force of 200 N is applied to a 55-kg cart across a 10-m level surface. If the cart accelerates at m/s^2, then what is the work done by the force of friction
a steel rod is used to transfer heat from a chamber at 300 k to a chamber at 250 k. which of the following changes in
High voltage power lines are a familiar sight throughout the country. Find the resistance of ten kilometers of this wire
A yo-yo is made of two solid cylindrical disks, each of mass 0.052 kg and diameter 0.070 m, joined by a (concentric) thin solid cylindrical hub of mass 0.0053 kg, What fraction of its kinetic energy is rotational
It shouldn't matter how many calories were consumed or how long the person walked or ran, we are just making a comparison of burning calories while exercising at 5km/h and 15km/h.
A rocket traveling 1850 m/s away from the Earth at an altitude of 6800 km fires its rockets, at what rate must the gases be ejected
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