Physics Work,Power & Energy Level: Misc Level
A 808 kg automobile is moving at 26.6 m/s at a height of 5.0 m above the bottom of a hill when it runs out of gasoline . The car coasts down the hill and then continues coasting up the other side until it comes to rest.lgnoring frictional forces and air resistance, what is the value of h the highest position the car reaches above the bottom of the hill?
Physics Work,Power & Energy Level: Misc Level
A shooting star is a meteor that burns up when it reaches Earth s atmosphere. Many of these meteoroids are quite small. Calculate the kinetic energy of a meteoroid of mass 6.0 g moving at a speed of 48 km/s and compare it to the kinetic energy of a 1400 kg car moving at 29 m/s (65 mi/h).
M J( meteor)
M J( car)
Physics Force & Laws Of Motion Level: Misc Level
Josie and Charlotte push a 9 kg bag of playground sand for a sandbox on a friction less, horizontal ,wet polyvinyl surface with a constant, horizontal force for a distance of 8 m, starting from rest, If the final speed of the sand bag is 0.39 m/s , what is the magnitude of the force with which they pushed?
Physics Force & Laws Of Motion Level: Misc Level
A 4.0 kg ball moving to the right at 6.0 m/s makes an elastic collision with a 2.0 kg ball moving to right at 3.0 m/s Find the velocity of the 4 kg ball after collision.
Physics Force & Laws Of Motion Level: Misc Level
A boy whose mass is 35.0 kg and a girl whose mass is 25.0 kg face each other inititially at rest on frictionless roller skates. The boy pushes the girl, who moves away at a speed of 1. 50 m/s. what is the boys speed?
Physics Work,Power & Energy Level: Misc Level
The figure shows two positions of bead sliding along a stiff wire track. The bead is released from rest at point A and comes to stop {momentarily} at point B. The heights of these points above the horizontal are 50 cm and 30 cm , respectively. The length of the wire between them is 400 cm. If the bead is 3. 0 g and the frictional force is approximately constant throughout the motion , find the value of this frictional force. watch your units. The picture is like a U with point A almost to the top on the left side of the U and the B point being two ards the lower part of the right side of the U
Physics Work,Power & Energy Level: Misc Level
A roller coaster is traveling on a horizontal track at 20 m/s. what is its speed after climbing a hill 15 m high? Ignore friction.
Physics Work,Power & Energy Level: Misc Level
A 1400 kg car is being towed. A net forward, horizontal force of 4500 N is applied to the car, initially at rest. lgnoring friction, what is the car s kinetic energy after it has traveled 100 m?
Physics Work,Power & Energy Level: Misc Level
The coefficients of static and kinetic friction for wood on wood are 0. 500 and 0. 300, respectively.A wooden box of 100 kg is at rest on a horizontal wooden floor. A horizontal force" just enough" to get the box moving is applied and then maintained after the box begins to move. what is the resulting acceleration of the box?
Physics Force & Laws Of Motion Level: Misc Level
A 2.00 kg block on a frictionless plane inclined at (30 degrees)from the horizontal has a force of magnitude P acting on it upward parallel to the incline. Nevertheless the block is accelerating downward at 2.00 m/second square (only the second is squared). Calculate P.
Physics Force & Laws Of Motion Level: Misc Level
Two forces act on a block of mass 4.5 kg resting on a frictionless,horizontal surface. The horizontal force is 3.7 N: the other force of 5.9 N acts at an angle of (43 degrees) from the horizontal. what is the magnitude of the acceleration of the block?
Physics Force & Laws Of Motion Level: Misc Level
A 810 kg car accelerates from rest to 27 m/s in a distance of 120 m. what is the magnitude of the average net force acting on the car?
Physics Work,Power & Energy Level: Misc Level
150 joules of energy is added to a system that has 75 joules of work done on it.
Physics Work,Power & Energy Level: Misc Level
75 joules of energy is removed from a system that has 50 joules of work done on it.
Physics Work,Power & Energy Level: Misc Level
100 joules of energy is added to a system that does 40 joules of external work.
