Master Physics with Fun Quizzes & Brain Teasers!

Researchers test canine locomotion by measuring the ground reaction force (the vector sum of the normal force and the propulsion force) as dogs push down and backward with both rear legs. In one trial, a dog generated an instantaneous ground reaction force that was 1.7 times the dog's weight and angled 12 from vertical.What was the magnitude of the dog's horizontal acceleration at that moment?
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On release 1 a student releases a cart from the top of a ramp such that the cart was travel 200 cm before hitting the stopper. The cart increase the speed steadily and reaches the bottom of the ramp in 4.40 seconds. What was the magnitude of the cart acceleration on release 1 ? The student then releases the cart from a lower position such that the cart only travels 70.0 cm. What was the magnitude of the carts acceleration on release 2? How long did the car take to reach the bottom of the ramp on release 2? Please see the picture
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A rubber ball is attached to a 1.44m string and spin in a horizontal circle. The tension in the string is 2.91 N. It takes 0.644s for the ball yo complete one revolution. What is the mass in kg of the ball?
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_____ is described as the change in potential energy per unit charge in an electric field.1) Gravitational field2) Electric potential difference3) Electric field4) Electric field line
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why the first hill of a roller coaster must be the tallest.
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The ratio of the final kinetic energy to the initial kinetic energy of an object is one half. If the initial velocity of the object is 10m/s, what is the final velocity?Select one: A. 2.7 m/sO B 1.5 m/sO C. 7.1 m/sO D. 10 m/sO E. 20 m/s
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Graph each equation on the same set of axes so you can visually compare the payment methods. Let the horizontal axis be the number of days swimming, x, and the vertical axis the cost in dollars, y.
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Circuit breakers and fuses are important safety features of circuits because _____.Select one:a.they decrease the voltage of the circuit b.they decrease the resistance of the circuit c.they interrupt the flow of excess currentd.all of the above
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A roller coaster car travels along the track shown in the diagram above At which position on the track are the kinetic and potnetial energy of the roller coaster car almost equal to each other
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Hello I attached a screenshot of the question I am having difficulty with
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What would be the gauge pressure in the tire when its temperature rises to 44 degrees Celsius
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A car does 100 laps on a circular track of length 10 km. The distance and displacement for the car are
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The escape speed from the surface of Planet Zoroaster is 24.0 km/s. The planet has no atmosphere. A meteor far away from the planet moves at speed 2.00 km/s on a collision course with Zoroaster. How fast is the meteor going when it hits the surface of the planet? km/s
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A cheetah can run at a maximum speed 95.2 km/h and a gazelle can run at a maximum speed of 79.9 km/h. If both animals are running at full speed, with the gazelle 53.1 m ahead, how long before the cheetah catches its prey? Answer in units of s. (Part 1)The cheetah can maintain its maximum speed for only 7.5 s.What is the minimum distance the gazelle must be ahead of the cheetah to have a chance of escape? (After 7.5 s the speed of cheetah is less than that of the gazelle.)Answer in units of m. (Part 2)
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A soccer ball is kicked from point p_i at angle above a horizontal field. The Baul follows an ideal path no friction before landing on the field at point p_f.What happens to the magnitude of the soccer ball's vertical acceleration from position X to position Y?
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Find the equivalent resistance between points A and B shown in the figure(Figure 1). Consider R1 = 3.3 , R2 = 4.5 , R3 = 2.3 , R4 = 3.7 , R5 = 8.7 , and R6 = 7.0 .
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please help with problem 11. I already know that KE=PE but could use help answering the questions in 11
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Look at the following scenarios. Does it have GPE, KE, both, or neither? Explain.1. A helicopter is hovering over the ground2. A bat is hanging upside-down in a cave.3.A statue of George Washington is in the park.4.A soccer ball is kicked along the ground.5.A soccer ball is kicked in the air.6.A car is parked on the street.7.A cell phone is in your hand by your head.8.A cell phone is in your hand by your head as you walk down the street.9.A cash register sits on the counter.
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Anthony walks to Village Italian pizza place for lunch. He walks 1 km east, then 3 km south and then 1 km west again. What is the total distance Anthony travels to eat pizza? What is his displacement?
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What is the approximate radius of a 6429Cu nucleus in femto meters?
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The amount of light that passes through two polarizing filters depends on the angle between their polarizing axes. Is this true or false?
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The figure below shows the position of an object as a function of time. At which times is the particle moving to the right?
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1. Calculate the power it takes for a 583 N student to climb up1.5 m stairs in 2.1 seconds. (find work first!)GivenFormulaSubstituteSolve
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A wire transfers 15.0 C. How many electrons pass through the wire?
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