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The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting
An object is 9 cm high and is located p = 29.2 cm in front of a thin diverging lens of focal length f = -18 cm. Calculate the position (distance from the center of the lens) and the height of its i
An object weighs 279 N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 231 N. When it is immersed in oil, it weighs 260 N. Find the density of the o
A 100 kg skier slides from rest down a 50m, 30 degree slope. Calculate the skier's speed at the bottom.
Blocks with masses of 2.0 kg , 3.0 kg , and 6.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 53 N force applied to the 2.0 kg block.
Mars has a mass of 6.46 10 23 kg and a radius of 3.39 10 6 m. (a) What is the acceleration due to gravity on Mars? (b) How much would a 65-kg person weigh on this planet?
how much would a 80.0 kg person weight (a) on mars, were the acceleration of gravity is 3.93 m/s and (b) on earths moon, where the acceleration of gravity is 1.93 m/s
Two 0.40 kg soccer balls collide elastically in a head-on collision. The first ball starts at rest, and the second ball has a speed of 3.5 m/s. After the collision, the second ball is at rest. What
a. Neglect air resitance. Find rocket's kinetic energy when the rocket is 298 km above Earth's surface b. What is the max height that the rocket reaches.
An identical rocket is fired with the bottle lying on its side, pointing horizontally. In which case does the rocket leave the bottle with the greater acceleration?
What is Fx if the magnitude of the skier's velocity is (a) constant, (b) increasing at a rate of 1.4 m/s2, and (c) increasing at a rate of 2.8 m/s2.
A child is twirling a 0.012 kg ball on a string in a horizontal circle whose radius is .100 meters. The ball travels once around the circle in .500 seconds.. A) Determine the centripetal force actin
Describe the graph you obtained. How many edges are in the graph? Is it connected or not? What is the average degree and the degree distribution?
An automobile traveling at 15.0km/h along a straight, level road accelerates to 65.0km/h in 6.00s . What is the magnitude of the auto average acceleration.
A small, 300 cart is moving at 1.80 on an air track when it collides with a larger, 5.00 cart at rest. After the collision, the small cart recoils at 0.840. What is the speed of the large cart after
A neutron star has a mass of 2.20 × 1030 kg (about the mass of our sun) and a radius of 5.20 × 103 m. Suppose an object falls from rest near the surface of such a star. How fast would it
If the two nodes are disconnected, the distance is infinity. Is there a solution to the Konigsberg bridge walking problem?
If I hit at the same angle but with twice the initial velocity, how much further does the baseball go? Which angle should I hit at to maximize distance? Which baseball will hit the ground first?
In a cathode ray tube (CRT, like in your TV or computer monitor) electrons initially at rest are accelerated through a potential difference of 10 kV. What is their final speed?
Frequency: # of complete cycles per unit time, f. Units? Example: What is the amplitude, period, and frequency of the following motion? Period?
a basketball player tries to make a 12 court shot, releasing the ball at the height of the basket. Assuming that the ball is launched at 51 degrees 14 meters from the basket, what speed must the pla
an elevator moves downward in a tall building at a constant speed of 5m/s . Exactly 5s after the top of the elevator car passes a bolt loosely attached to the wall of the elevator shaft, the bolt fa
A muscle builder holds the ends of a massless rope. At the center of the rope, a 7.9-kg ball is hung. Each end of the rope subsequently makes an angle of Θ with the horizontal. What is the ten
A glass window 0.45 cm thick measures 86 cm by 38 cm. If the inside and outside temperatures differ by 18 Celsious, the heat flows through this window per minute is 68 kJ. To compare the relative e
Nobody knows every detail of the entire experiment. Wouldn"t it be cool if we could have a $1B proton machine in Urbana?