Work, Energy & Power Multiple Choice Questions & Quizzes

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Practice Questions

BeginnerA ball is thrown straight up. At what point does the ball have the most energy?
BeginnerYou are working out on a rowing machine. Each time you pull the rowing bar toward you, it moves a distance of \(1.25 \, \text{m}\) in a time of…
BeginnerThe box in the diagram is sliding to the right across a horizontal table, under the influence of the forces shown. Which force(s) is doing negative wo…
BeginnerJill does twice as much work as Jack does and in half the time. Jill's power output is
BeginnerA mechanic pushes a 2500 kg car from rest to a final speed v by doing 5.0 x 103 J of work on the car. Frictional effect between the car and the ground…
BeginnerIf a small motor does 520 J of work to move a toy car 260 meters in a time of 37 seconds, what force does the motor exert? And how much power does the…
BeginnerA boulder is raised above the ground so that its potential energy is \(550 \, \text{J}\). Then it is dropped. Assuming \(92 \, \text{J}\) of energy wa…
BeginnerA child on a sled reaches the bottom of a hill with a velocity of \( 10.0 \, \text{m/s} \) and travels \( 25.0 \, \text{m} \) along a horizontal strai…
IntermediateA golfer hits a shot to a green that is elevated \(2.80 \, \text{m}\) above the point where the ball is struck. The ball leaves the club at a speed of…
IntermediateA car accelerates uniformly from rest to 29.4 m/s in 6.93 s along a level stretch of road. Ignoring friction, determine the average power required to…
IntermediateThe alarm at a fire station rings and a 79.34-kg fireman, starting from rest, slides down a pole to the floor below (a distance of 4.20 m). Just befor…
IntermediateTwo balls are dropped from the roof of a building. One ball has twice as massive as the other and air resistance is negligible. Just before hitting th…
IntermediateTwo masses \(m_1\) and \(4m_1\) are on an incline. Both surfaces have the same coefficient of kinetic friction. Both objects start from rest at the sa…
IntermediateA block of mass 3.0 kg is hung from a spring, causing it to stretch 12 cm at equilibrium. The 3.0 kg block is then taken off and the spring returns to…
IntermediateA \( 0.0350 \) \( \text{kg} \) bullet moving horizontally at \( 425 \) \( \text{m/s} \) embeds itself into an initially stationary \( 0.550 \)…
IntermediateAn object at rest suddenly explodes into two fragments (\(m_1\) and \(m_2\)) by an explosion. Fragment \(m_1\) acquires \(3\) times the kinetic energy…
AdvancedA baseball is thrown vertically into the air with a velocity \( v \), and reaches a maximum height \( h \). At what height was the baseball moving wit…
AdvancedA block starts at rest on a frictionless inclined track which then turns into a circular loop of radius \( R \) and is vertical. In terms of \( R \) a…
AdvancedFind the escape speed from a planet of mass \(6.89 \times 10^{25} \, \text{kg}\) and radius \(6.2 \times 10^{6} \, \text{m}\).
AdvancedBall A is dropped from a building of height H. Ball B is dropped from a building of height 3.5H. Using energy, what the ratio of vA to vB (final veloc…
AdvancedA snowboarder starts from rest and slides down a \(32^\circ\) incline that's \(75 \, \text{m}\) long. If the coefficient of friction is \(0.12\), what…
AdvancedA simple pendulum consists of a sphere tied to the end of a string of negligible mass. The sphere is pulled back until the string is horizontal and th…
AdvancedA pendulum bob of mass \(m\) on a cord of length \(L\) is pulled sideways until the cord makes an angle \(\theta\) with the vertical. The change in po…
AdvancedRefer to the diagram above and solve all equations in terms of \(R\), \(M\), \(k\), and constants. What is the speed of mass \(2M\) as it reaches poin…

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