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what is the change in temperature of 22 kg of the following substances if 85 x 103 j of thermal energy is added to each of the substancesa
a 0150-kg ball that is thrown at a velocity of 300 ms hits a wall and bounces back in the opposite direction with a speed of 250 ms how much work was
a dartboard with a mass of 220 kg is suspended from the ceiling such that it is initially at rest a 0030-kg dart is thrown at the dartboard with a
the big hill on a roller-coaster ride is 91 m tallif the mass of the roller-coaster car and its two riders is 314 kg and the maximum velocity reached
a sled and its rider are perched at the top o a hill that is 35 m tall if the gravitational potential energy is 30 x 104 j what is the weight of the
a 35-kg child is riding on a swing that rises to a maximum height of 080 mneglecting friction what is the childs gravitational potential energy at
a pendulum bob with a mass of 050 kg swings to a maximum height of 10 m determine the kinetic energy when the pendulum bob is at a height of 040
a 150-kg roller-coaster car climbs to the top of a 91-m-high hill how much work is completed against gravity as the car is lifted to the top of the
a man exerts a force of 310 n on a lever to raise a crate with a mass of 910 kgif the efficiency of the lever is 78 percent what is the levers
a toy car with a mass of 075 kg is pulled32 m across the floor with a constant force of 110 n if 67 j of work is done what is the upward angle of the
a man pushes a couch a distance of 075 m if 113 j of work is donewhat is the magnitude of the horizontal force
a toy truck is pushed across a table 080 m north and pulled back across the table 080 m southif a constant horizontal force of 15 n was applied in
a 770-kg woman is walking 010 ms east in the gym a man throws a 150-kg ball south and accidentally hits the womanthe woman and the ball move together
an 82-kg receiver moving 075 ms north is tackled by a 1100-kg defensive lineman moving 015 ms eastthe football players hit the ground togethermeasure
a 1200-kg cannon is placed at rest on an ice rink a 950-kg cannonball is shot from the cannonif the cannon recoils at a speed of 680 mswhat is the
assume a 550-kg ice-skater who was initially at rest fires a 250-kg gun the 0045-kg bullet leaves the gun at a velocity of 5650 mswhat is the
an ice-skater with a mass of 750 kg pushes off against a second skater with a mass of 420 kg both skaters are initially at restafter the push the
ball a with a mass of 020 kg strikes ball b with a mass of 030 kg the initial velocity of ball a is 095 ms ball b is initially at restwhat are the
a 0040-kg bullet is fired into a 350-kg block of wood which was initially at rest the bullet remains embedded within the block of wood after the
a 500-g toy car travelling with a velocity of 300 ms due north collides head-on with a 1800-g fire truck travelling with a velocity of 050 ms due
a 420-kg skateboarder travelling at 150 ms hits a wall and bounces off of it if the magnitude of the impulse is 1500 kgmiddotmscalculate the final
a ball with an initial momentum of 600 kgms bounces off a wall and travels in the opposite direction with a momentum of 400 kgms what is the
a child starts to build a house of cards by laying an 85-cm-long playing card with a mass of 075 g across two other playing cards support card a and
a board that is 15 m long is supported in two places if the force exerted by the first support is 25 n and the forced exerted by the second is 62
an ice-skater with a moment of inertia of 11 kgm2 starts to spin with her arms extended after 25 s she has an angular velocity of 15 revswhat is the