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Q. A rifle bullet with a mass of 11.0 g traveling toward the right at 247 m/s strikes a large bag of sand and penetrates it to a depth of 24.5 cm. Determine the magnitude of the friction force (assumed constant) that acts on the bullet.
Q. A 5.80 g lead bullet traveling at 460 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in temperature of the bullet?
A rocket is launched at an angle of 56.0° above the horizontal with the initial speed of 101 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 28.0 m/s2. At this time, its engines fail and the rocket proceeds..
Two 10 cm long thin glass rods uniformly charged to + 10;{rm nC} are placed side by side, 4cm apart. What are the electric field strengths E_1, E_2, and E_3 at distances 1.0 cm, 2cm, and 3cm to the right of the rod on the left, along line connecti..
A driver in a car travelling at a speed of 58.0 mi/h sees a deer 126 m away on the road. Calculate the minimum constant acceleration that is necessary for the car to stop without hitting the deer (assume that the deer does not move in the meantime).
An airplane is flying with a velocity of 95 at an angle of 19 above the horizontal. When the plane is a distance 111 m directly above a dog that is standing on level ground, suitcase drops out of luggage compartment.
A massless spring with spring constant 22.10 N/m hangs vertically. A body of mass 0.280 kg is attached to its free end and then released. Assume that the spring was unstretched before body was released. How far below the initial position does the ..
A river has a steady speed of 0.42m/s. A student swims upstream a distance of 1 km and swims back to the starting point. If the student can swim at a speed of 1.25 m/s in still water, how long does the trip take.
A spring with spring constant 12.5 hangs from the ceiling. A 400 ball is attached to spring and allowed to come to rest. It is after that pulled down 6.80 and released. What is the time constant if the ball's amplitude has decreased to 3.90 after 57...
An elevator releases 11200J of gravitational potential energy as descending 4m between floors. How much does elevator weigh.
A 10 Newton effort force is required to lift a 10kg box just off the ground. What is the effort required to lift the box off the ground using a 3m long lever.
Cold fusion theory.
The magnitude of the force of friction acting on the block between A and is 1.2N and points A and B are 0.5 m apart. If the kinectic energies of the block at A and B are 4J and 5.6 J, respectively, how much work is done on the block by the force p..
If she is served 200 of coffee at 84 in a well-insulated container, how much ice at 0 should she add to obtain a final temperature of 31.
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