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10 microN at an angle of 45°. Another flea pulls on the puck with force 2 microN at an angle of -60°. Carefully add the vectors tip-to-tail. (Use a ruler.) What is the magnitude of the net
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 80.0 cm, what was the speed of the bullet at impact with the block?
A flea pulls on a puck with force 7 microN at an angle of 30?. Another flea pulls on the puck with force 2 microN at an angle of -60?. a) What is the magnitude of the net force on the puck? (I got 7
An Olympic long jumper leaves the ground at an angle of 23o and travels through the air for a horizontal distance of 8.7 before landing. What is the takeoff speed of the jumper?
A 7.0-g bullet is fired into a 1.5-kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a maximum height of 12 cm. Find the initial speed of the b
The block of mass (M) is placed on a to a mass (m) hanging over a pulley. As the mass released and starts to fall, the block will slide across the track.
Water is pumped into a storage tank from a well delivering 22.0 gallons of water in 34.0 seconds through a pipe of 1.00 in.2 cross-sectional area. What is the average velocity of the water in the p
If the patch is 78 meters wide and the average force of air resistance on the skier is 179 newtons, how fast is she going after crossing the patch? (Note you must have first found the skier speed at
A hollow cylinder of mass 0.140 kg and radius 3.80 cm has a string wrapped several times around it. A string is attached to a rigid support and the cylinder allowed to drop from rest. (a) Find the a
A pistol that fires a signal flare gives the flare an initial speed (muzzle speed) of 145 m/s.
An electron in a TV picture tube is accelerated through a potential difference of 1.0 multiplied by 104 V before it hits the screen. What is the kinetic energy of the electron in electron volts?
A jetliner, traveling northward, is landing with a speed of 65 m/s. Once the jet touches down, it has 715 m of runway in which to reduce its speed to 6.0 m/s. Compute the average acceleration (magn
A plane flies from base camp to lake A, a distance of 240 km at a direction of 20.0° north of east. After dropping off supplies it flies to lake B, which is 210 km and 30.0° west of north f
A 15 kg mass starts from rest and slides down an inclined plane 8.0 10-1 m long in 0.7 s. What net force is acting on the mass along the incline?
The free-fall acceleration on the moon is 1.62 {rm{ m/s}}^{rm{2}}. What is the length of a pendulum whose period on the moon matches the period of a 1.80-m-long pendulum on the earth?
You have a mass of 87 kg and are on a 50-degree slope hanging on to a cord with a breaking strength of 221 newtons. What must be the coefficient of static friction to 2 decimal places between you a
A 4.00 11.0 swimming pool slopes linearly from a 1.20 depth at one end to a 3.80 depth at the other. What is the mass of water in the pool?
A rifle with a barrel length of 61 cm fires a 12 g bullet with a horizontal speed of 440 m/s. The bullet strikes a block of wood and penetrates to a depth of 12 cm.
You have a mass of 87 kg and are on a 50-degree slope hanging on to a cord with a breaking strength of 221 newtons. What must be the coefficient of static friction to 2 decimal places between you an
A 29.0 kg child on a 3.00 m long swing is released from rest when the ropes of the swing make an angle of 32.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest p
A speed skater moving across frictionless ice at 8.1 m/s hits a 5.7 m wide patch of rough ice. She slows steadily, then continues on at 5.8 m/s. What is her acceleration on the rough ice?
Halley's Comet orbits the sun about every 75 years due to the gravitational force the sun provides. Compare the gravitational force between Halley's Comet and the sun when the comet is at aphelion (
A 12.8 g bullet is fired horizontally into a 102 g wooden block initially at rest on a horizontal surface. After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic
An object of length 3.00 cm is inside a plastic block with index of refraction 1.40. If the object is viewed through the top surface of the block at a non-zero angle from the normal, where is the o