1,302 Answered Questions for the topic physical science
How much energy (in J) is stored in the spring under this circumstance?
A 38 kg child uses a pogo stick to bounce up and down. The spring constant, k, of the toy equals 9,300 N/m.(a) By how much would the spring be compressed by the child if she simply balanced...
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Find the net force on the runner using the alternate form of Newton's second law.
A runner with a mass of 85 kg accelerates from 0 to 6 m/s in 9 s. Find the net force on the runner using the alternate form of Newton's second law.
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The change in momentum is the car's momentum when traveling 20 m/s minus its momentum when going 0 m/s. (Enter the magnitude.)
Using the alternate form of Newton's second law, compute the force (in N) needed to accelerate a 1,240 kg car from 0 to 20 m/s in 16 s. The change in momentum is the car's momentum when...
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Find the sprinter's linear momentum (in kg · m/s). (Enter the magnitude.)
A sprinter with a mass of 83 kg reaches a speed of 9 m/s during a race. Find the sprinter's linear momentum (in kg · m/s). (Enter the magnitude.)
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what factor does the amount of mechanical energy stored in the spring change?
A spring is stretched by an initial amount from its relaxed state. If the spring is then stretched by three times that amount from its relaxed state, by what factor does the amount of mechanical...
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Compute how much kinetic energy was "lost" in this inelastic collision.
A 9,100-kg truck runs into the rear of a 1,000-kg car that was stationary. The truck and car are locked together after the collision and move with speed 8 m/s. Compute how much kinetic energy was...
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What is its speed (in m/s)?
A loaded gun is dropped on a frozen lake. The gun fires, with the bullet going horizontally in one direction and the gun sliding on the ice in the other direction. The bullet's mass is 0.04 kg, and...
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Physical Science Physics
11/11/20
Determine maximum kinetic energy, in eV.
Indigo light of wavelength 455nm is used in a photoelectric effect experiment that involves directing the light source at the selenium that has a work function of 1.5x10-19J. Determine if any...
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Physical Science Physics
11/11/20
Radio Signals; Revolution Unit
A distant star has been measured as moving at a speed of 0.59c away from the Earth. If a planet of this star sends radio signals to Earth every 17 seconds (according to their time scale), how often...
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Physical Science Physics
11/10/20
Calculating total fringes
Light that has a wave length of 686 nm is used to illuminate two glass plates at normal incidence. The plates are 26.7cm in length touching at one end are separated at the other end by a wire that...
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Physical Science Physics
11/10/20
Calculating total fringes on a plate
Light that has a wave length of 686 nm is used to illuminate two glass plates at normal incidence. The plates are 26.7cm in length touching at one end are separated at the other end by a wire that...
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Write the kinetic, potential and total energy of a baseball having a mass of 0.145kg held 10 meters above the ground.
Write the kinetic, potential and total energy of a baseball having a mass of 0.145kg held 10 meters above the ground.
The baseball was released under the influence of gravity on Earth and...
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What is the acceleration experienced by passengers on this ride in g's?
The Kingda Ka roller coaster in New Jersey is the world's tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57...
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How far does the jet travel during the 7 s?
A jet aircraft with a mass of 4,400 kg has an engine that exerts a force (thrust) equal to 60,200 N.(a) What is the jet's acceleration when it takes off? (Give the magnitude.)(b)What is the jet's...
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What is the force in pounds that acts on him during the launch phase of this ride?
The Kingda Ka roller coaster in New Jersey is the world's tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57...
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How far does the jet travel during the 7 s?
A jet aircraft with a mass of 4,400 kg has an engine that exerts a force (thrust) equal to 60,200 N.What is the jet's acceleration when it takes off? (Give the magnitude.)What is the jet's speed...
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What is the force in pounds that acts on him during the launch phase of this ride?
The Kingda Ka roller coaster in New Jersey is the world's tallest ride of its kind. As the passenger cars are launched from rest at the start, they are accelerated uniformly to a speed of 57...
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What is the net force on the motorcycle?
A motorcycle and rider have a total mass equal to 375 kg. The rider applies the brakes, causing the motorcycle to accelerate at a rate of −6 m/s2. What is the net force on the motorcycle? (Indicate...
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Find the elephant's weight in newtons.
The mass of a certain elephant is 5,567 kg.Find the elephant's weight in newtons.Find its weight in pounds.
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A child weighs 339 N. What is the child's mass in kilograms?
A child weighs 339 N. What is the child's mass in kilograms?What is the child's mass in slugs?
What is the acceleration of the jet in m/s2?
On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. One such catapult takes a 17,600-kg jet from 0 to 68 m/s in 2.6 s. (Assume the catapult...
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What is the net force on the motorcycle?
A motorcycle and rider have a total mass equal to 375 kg. The rider applies the brakes, causing the motorcycle to accelerate at a rate of −6 m/s2. What is the net force on the motorcycle? (Indicate...
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How far does the jet travel during the 7 s?
A jet aircraft with a mass of 4,400 kg has an engine that exerts a force (thrust) equal to 60,200 N.What is the jet's acceleration when it takes off? (Give the magnitude.)What is the jet's speed...
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What is the size of the force when it is at each of the following distances from Earth's center?
A space probe is launched from Earth headed for deep space. At a distance of 10,000 miles from Earth's center, the gravitational force on it is 457 lb. What is the size of the force when it is at...
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What is it in g's?
A race car rounds a curve at 53 m/s. The radius of the curve is 405 m, and the car's mass is 670 kg. (Assume the car's speed remains constant. Take the radially inward direction to be positive....
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