Physics

All new and solved questions in Physics category

1 answer
A place kicker must kick a football from a point 36.0 meters (about 40yds)from the goal
A place kicker must kick a football from a point 36.0 meters (about 40yds)from the goal. as a result of the kick, the ball must clear the crossbar, which is 3.05 meters high. When kicked the ball leaves the ground with a speed of 20.0 m/s at and angle of 53 degrees to the horizontal a) how much does...
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One of the fastest recorded pitches major-league baseball, thrown by Nolan Ryan in 1974, was clocked at 100.8 mi/hr
One of the fastest recorded pitches major-league baseball, thrown by Nolan Ryan in 1974, was clocked at 100.8 mi/hr. If a pitch were thrown horizontally with this velocity, how far would the ball fall vertically by the time it reached home plate 60.0 ft away?...
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A rifle is fired straight up, and the bullet leaves the rifle with an initial velocity magnitude of 724 m/s
A rifle is fired straight up, and the bullet leaves the rifle with an initial velocity magnitude of 724 m/s. After 5.00 s the velocity is 675 m/s. At what rate is the bullet decelerated?...
1 answer
Harry jumps horizontally from the top of a building that is 20.0 m high
Harry jumps horizontally from the top of a building that is 20.0 m high. He hopes to reach a swimming pool that is at the bottom of the building, 14 m horizontally from the edge the building. If he is to reach the pool, what must his jumping speed be?...
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I'm confused about how to set up the following relative velocity problem:George V Coast in Antarctica is the windiest place on Earth
I'm confused about how to set up the following relative velocity problem:George V Coast in Antarctica is the windiest place on Earth. Wind speeds there can reach 3.00e10^2 km/h. If a research plane flies against the wind with a speed of 4.50e10^2 km/h relative to the wind, how long does it take ...
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A toy car in the figure below runs off the edge of a table that is h = 1.375 m high
A toy car in the figure below runs off the edge of a table that is h = 1.375 m high. The car lands d = 0.375 m from the base of the table.How fast was the car going on the table?...
2 answers
A 10kg block is released from the top of a ramp 45m high
A 10kg block is released from the top of a ramp 45m high. the track is frictionless except for a 6m stretch in the middle. when the block reaches the end, it compresses the k=2250N/m spring a distance of 0.030m. Find the coefficient of friction over the rough patch in the middle....
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A diver completes 3 1/2 somersaults in 1.7 seconds
a diver completes 3 1/2 somersaults in 1.7 seconds. what is the average angular speed in rad/sec of the diver?...
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A person jumps from the roof of a house 3.6 -m high
A person jumps from the roof of a house 3.6 -m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70 {rm m}. If the mass of his torso (excluding legs) is 46 kg. Find the average force exerted on his torso by his legs during dece...
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A student lifts a 1.2 kg bag from her desk, which is 0.59 m high, to a locker that is 2.9 m high
A student lifts a 1.2 kg bag from her desk, which is 0.59 m high, to a locker that is 2.9 m high. What is the gravitational potential energy of the bag relative to the desk? PE=mgh 1.2(9.80)(2.9) = 34.1...
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A lead ball is dropped into a lake from a diving board 4.70m above the water
A lead ball is dropped into a lake from a diving board 4.70m above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 4.10s after it is released. I just need the number....
1 answer
A diver running 2.4 m/s dives out horizontally from the edge of a vertical cliff and 2.6 s later reaches the water below
A diver running 2.4 m/s dives out horizontally from the edge of a vertical cliff and 2.6 s later reaches the water below. How high was the cliff?...
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Another scheme to catch the roadrunner has failed
another scheme to catch the roadrunner has failed. A safe falls from rest from the top of a 34.6 m high cliff toward Wiley Coyote, who is standing at the base. Wiley first notices the safe after it has fallen 17.2 m. The acceleration of gravity is 9.8m/s^2. how long does he have to get out of the wa...
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A cannonball is fired from ground level at an angle of 60.0 degrees with the ground at a speed of 72.0 m/s
A cannonball is fired from ground level at an angle of 60.0 degrees with the ground at a speed of 72.0 m/s. What is the initial velocity along the x-axis?What is the initial velocity along the y-axis?What is the total time in the the air if the cannonball impacts the ground at the same vertical heig...
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A spy satellite is in circular orbit around Earth
A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. (a) How high above Earth's surface is the satellite? [Answer in Km] (b) What is the satellite's acceleration? [Answer in m/s^2] I see this posted over and over again and I have about 4 equations, 20 dif...
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I need help in my physics homework
I need help in my physics homework... plz help its about average acceleration...1. As the suttle bus comes to a sudden stop to avoid hitting a dog, it accelerates unformaly at -4.1 m/s(squared) as it slows from 9.0 m/s ti 0.0 m/s. Find the time interval of acceleration for the bus.2. A car traviling...
2 answers
Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 75 steps per minute, with each step 8.00 inches high
Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 75 steps per minute, with each step 8.00 inches high. If you weigh 150 lb and the machine reports that 690 kcal have been burned at the end of the workout, what efficiency is the machine using in obtaining this result?...
2 answers
Robin Hood is walking through Sherwood Forest when he comes upon Sheriff of Nottingham
Robin Hood is walking through Sherwood Forest when he comes upon Sheriff of Nottingham. The Sheriff tells Robin Hood that he is going to arrest hum for numerous misdeeds. Robin pulls out his bow, loads an arrow, puls the bow back 0.70 m, and shoots an arrow into the Sheriff's hat, knocking the h...
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A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.9 m/s
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.9 m/s. The car is a distance d away. The bear is 24 m behind the tourist and running at 6.0 m/s. The tourist reaches the car safely. What is the maximum possible value for d?...
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For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 16.0 m/s and initial angle of 36.8° with respect to the horizontal
For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 16.0 m/s and initial angle of 36.8° with respect to the horizontal. (a) Where will the golf ball fall back to the ground? (b) How high will it b...

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