A man stands on the roof of a 15.0m tall building and throws a rock with a velocity of magnitude 30.0m/s at an angle of 33.0 degrees above the horizon. You can ignore air resistance. Calculate: 1) The maximum height above the roof reached by the rock. 2) The magnitude of the velocity of the rock just before it strikes
A physics student with too much free time drops a watermelon from the roof of a building. He hears the sound of the watermelon going "splat" after a time interval of delta (change) t. You may ignore air resistance. How high is the building? The speed of sound is vs . Take the free fall acceleration to be g.
In the vertical jump, an athlete starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00 s in the air (their "hang time"). Treat the athlete as a particle and let ymax be his maximum height above the floor. To explain why he seems to hang in the air, calculate th
The scale of a spring balance reading from 0 to 210 has a length of 12.5 . A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.30 . Ignoring the mass of the spring, what is the mass of the fish? Express your answer in kilograms.
Take g=9.8m s(-2) for all these questions: A tile slides off a roof pitched at an angle of 30 degrees to the horizontal. The distance from the roof to the ground (flat) is 12m. If the speed of the tile is 8m s(-1) when it leaves the roof find: Please answer all the following questions with full explanations: 1) The hori
A golf ball (m = 46.0 g) is struck with a force that makes an angle of 45.7° with the horizontal. The ball lands 207 m away on a flat fairway. If the golf club and ball are in contact for 7.06 ms, what is the average force of impact? (Neglect air resistance.)
7-10: Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine of length 20m that makes an angle of 45Degree with the vertical, steps off his tree limb, and swings down and then up to Jane's open arms. When he arrives, his vine makes an angle of 30 degree with the vertical. Determine whether he gives her a te
A plane, flung horizontally, releases a bomb, which explodes before hitting the ground. Neglecting air resistance, the center of mass of the bomb fragments, just after the explosion a. is zero b. moves vertically c. moves horizontally d. moves along a parobolic path
A projectile is launched with an initial velocity of 2.8 m/s at an angle of 30 degrees above the ground. Assume there is no air resistance and that the acceleration due to gravity is g = 9.81 m/s^2. ??What is the maximum height the projectile will reach???
A 10.6 kg object oscillates at the end of a vertical spring that has a spring constant of 2.05 * 10^4 N/m. The effect of air resistance is represented by the damping coefficient b= 3.00 Ns/m. (a) Calculate the frequency of the damped oscillation. (b) By what percentage does the amplitude of the oscillation decrease in each cycl
Write the simplest model for how high the roof of a baseball stadium would have to be, neglecting air resistance and other inconvenient aspect of base ball.
A 45.0-kg woman stands up in a 60.0-kg canoe of length 5.00 m. She walks from a point 1.00 m from one end to a point 1.00 m from the other end. If you ignore resistance to motion of the canoe in the water, how far does the canoe move during this process?
A sled is being held at rest on a slope that makes an angle theta with the horizontal. After the sled is released, it slides a distance d1 down the slope and then covers the distance d2 along the horizontal terrain before stopping. Which assumptions are reasonable to make in this problem? There can be more than one answer. A)
Kate, a bungee jumper, wants to jump off the edge of a bridge that spans a river below. Kate has a mass m, and the surface of the bridge is a height h above the water. The bungee cord will first straighten and then stretch as Kate falls. Assume that the bungee cord behaves as an ideal spring once it begins to stretch. Neglect th
A raindrop of initial mass Mo starts falling from rest under the influence of gravity. Assume that the drop gain mass from the cloud at a rate proportionnal to the product of its instantaneous mass and its instantaneous velocity: dM/dt = kMV where k is a constant. Show that the speed of the drop eventually becomes effective
6.) A spring-loaded cannon aimed at 47 degrees above the horizontal is on the last car of a long train of flat cars. The train has an initial velocity of 54.3 km/h. At the moment the train begins to accelerate forward at 0.325 m/s2 , the cannon fires a projectile at 180 m/s. The cannon points in the direction that the train is m
1. In a particular television tube, the beam current is 60.0 MuA. How long does it take for 3.75 x 10^14 electrons to strike the screen? 2. A stereo with a resistance of 65 ohms is connected across a potential difference of 120 V. What is the current in this device? 3. The current in a microwave oven is 6.25 A. If the
In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 1.8e6 ohms. One pulse is delivered every time the fully charged capacitor loses 62.9 % of its original charge. What is the capacitance of the capacitor? Answer in farads.
Please see the attached file for full problem description. A bomb flying in level flight must release its bomb before it is over the target. Neglecting air resistance, which one of the following is NOT true? see attached.
A fire helicopter carries a 607 kg bucket of water at the end of a 17.4 m long cable. Flying back from a fire at a constant speed of 35.3 m/s, the cable makes an angle of 41.6° with respect to the vertical. Determine the force of air resistance on the bucket.
"If a bicyclist of mass 69.0 (including the bicycle) can coast down a 6.90 degree hill at a steady speed of 5.60 km/hr because of air resistance, how much force must be applied to climb the hill at the same speed?"
Six model rockets (ABCDEF) have just had their engines turned off. All of the rockets are aimed at the same angle, but their speeds differ. All of the rockets are the same size and shape, but they carry different loads, so their masses differ. (Their respective masses are listed below.) At the instant when the engines are turned
"An artillery shell is fired with an initial speed of 1.80x10^3 m/s at a angle of 54.3 degrees above the horizontal and returns to its original level before impact. Neglecting air resistance, calculate the time it is in motion. And calculate the horizontal distance traveled." Thank you!
The light bulb used in an overhead projector has a resistance of 24 Ohms. What is the current through the bulb when it is operating on 120V?
A battalion of soldiers aims their cannon at an angle of 30° up from horizontal and fires it as shown below in a large, level field. The initial speed of the cannon ball is 196 m/s. Neglect air resistance and assume that the cannon ball starts at ground level for simplicity. Use g = 9.8 m/s2. What is the maximum height reac
The electrical resistance of a particular electrolytic cell is 5.00 Ohms. A potential difference of 50.0 volts is applied across the cell. If the cell is a copper cell, how much time will be required for 63.54 grams of copper to be deposited on the negative electrode? (Assume the valence of copper is +2).