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BAED-PHYC2121 General Physics 1
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Rita accelerates a 0.45-kg ball from rest to 8.0 m/s during the 0.15 s in which her foot is in contact with the ball. What average force does she apply to the ball during the kick?
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A uranium nucleus (mass 238 units) at rest decays into a helium nucleus (mass 4.0 units) and a thorium nucleus (mass 234 units). If the speed of the helium nucleus is 6.5 × 105 m/s, what is the speed of the thorium nucleus?
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If during a given physical process the only force acting on an object is friction, which of the following must be assumed in regard to the object's kinetic energy?
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6.5 Conservative Versus Nonconservative Forces and Conservation of Energy
How fast would a 1000-kg car be traveling if it had a kinetic energy equal to 1000 Calories?0%
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A 6-kg object is moving to the right at 4 m/s and collides with a 4-kg object moving to the left at 6 m/s. The objects collide and stick together. After the collision, the combined object:50%
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A projectile is launched with speed v at an angle θ, the angle being less than 45º. What other angle would give the same range for this projectile launched at the same speed v?
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A 1 500-kg car rounds an unbanked curve with a radius of 52 m at a speed of 12 m/s. What minimum coefficient of friction must exist between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)
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A Hooke's law spring is compressed 15.0 cm from equilibrium and the potential energy stored is 72.0 J. What is the spring constant in this case?
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An asteroid in orbit about the sun has a linear speed of 4 km/s when at a distance of closest approach d from the sun. What is its linear speed when it is at its greatest distance from the sun, a distance 2 d?
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A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s. It is then turned off and coasts to a stop in an additional 40 s. The ratio of the average angular acceleration for the first 20 s to that for the last 40 s is which of the following?
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