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A racquetball strikes a wall with a speed of 30 \rm m/s and rebounds with a speed of 26 \rm m/s. The collision takes 20 \rm ms. What is the average acceleration of the ball during the collision?
How high from the surface of the earth must an object be raised, What minimum speed is needed by the object to ascend to this height
Consider an experiment where a subject lands during two conditions from a height of 0.2 m. During the first landing condition, the subject lands 'stiffly' (e.g., very little knee flexion).
A 250g , 49.0 cm diameter turntable rotates on frictionless bearings at 60.0 rpm. What is the turntable's rotation angular velocity when the block reaches the outer edge
A converging lens is located 10.0 cm to the left of a diverging lens. The focal length of the converging lens is +20.0 cm. where is the final image formed by the diverging lens
When a hammer strikes a nail, it is compressed along its length. What is the impulse imparted to the hammer
The change in the kinetic energy of the system
the velocity of an airplane is 50km/hr due north. the plane the plane flies into a cross wind of 50km/hr due east at a right angle
A convex spherical mirror with a radius of curvature of 11.0 cm produces a virtual image one third the size of the real object. Where is the object
After 2.02 days, the activity of a sample of an unknown type radioactive material has decreased to 82.2% of the initial activity. What is the half-life of this material
Oil is being loaded into a barge through a 150 mm diameter pipe whose exit is at an angle ? = 60? to the horizontal. Determine the force exerted by the barge on the rope
The rotor in a certain electric motor is a flat, rectangular coil with 84 turns of wire and dimensions 2.45 cm by 4.04 cm. The rotor rotates in a uniform magnetic field of 0.800 T. Find the peak power output of the motor
A block of mass mb is attached to one end of a spring and is sliding on a horizontal frictionless surface. the other end of the spring is fixed. find the new period and new amplitude of the motion
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