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Calculate momenta before collision of the objects with masses m1=10g and m2=20g, moving with speeds v1=2m/s and v2=7m/s.
Calculate momenta after collison, is the new velocities are v1' = 1m/s and v2' = 7m/s.
An 85-g arrow is red from a bow whose string exerts a constant force of 105 N on the arrow over a distance of 75 cm. Illustrate what is the speed of the arrow as it leaves the bow?
Two carts with masses of 12.5 kg and 4.5 kg, respectively, move in opposite directions on the frictionless horizontal track with speeds of 8 m/s and 5 m/s, respectively. The carts stick together after colliding head-on. Find the final speed of the..
A hot air balloon is rising upward with a constant speed of 5 m/s. How high above the ground is the balloon when the compass hits the ground
In the process of changing a flat tire, a motorist uses a hydraulic jack. She begins by applying a force of 41 N to the input piston, determine the force that the output plunger applies to the car
A grandfather's clock is calibrated at a temperature of 20 C. The pendulum is a thin brass rod with a heavy mass attached to the end. On a hot day, when the temperature is 30 C, does the clock run fast or slow? How much time does it gain or lose i..
a monochromatic beam of light of wavelength 600nm is incident on a diffraction grating with a slit spacing of 1.7*10^-4cm
Biological muscle cells can be thought of as nanomotors that use the chemical energy of ATP to produce mechanical work. How much work is done by such proteins
Two children setup a "telephone" by placing a long, slender aluminium (Y = 6.9 × 1010 N/m2) bar that has a length of 6.1-m between their two houses. To communicate, the child taps a coded message on one end. How long do the sound waves take to reach ..
A football player carrying the ball runs straight ahead at the line of scrimmage and directly into a wall of defensive linemen. Find the magnitude and direction of his average acceleration
A 17g particle is moving to the left at 24m/s. How much net work must be done on the particle to cause it to move to the right at 40 m/s.
An aluminum-alloy rod has a length of 10.009 cm at 16.200°C and a length of 10.021 cm at the boiling point of water. compute the length of the rod at the freezing point of water
What is the distance between the centers of the two slits? Describe answer in m.
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