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A rescue plane drops a package of emergency rations to a stranded party of explorers. The plane is traveling horizontally at 150.0 m/s at a height of 70.0 m above the ground. What horizontal distanc
Two stationary positive point charges, charge 1 of magnitude 3.45 and charge 2 of magnitude 1.90 , are separated by a distance of 51.0 . An electron is released from rest at the point midway between
A laser beam in air is incident upon ethanol at an angle of incidence of 37 degrees. What is the angle of refraction?
A Ferris wheel rotates at an angular velocity of 4.5×10-2 . At your friend Seth is at the very top of the ride. What is Seth's angular position at = 3.2 measured counterclockwise from the top?
The error in the experiment of L is the error inherent in the use of any scale (half the distance between adjacent markings, doubled because of two ends to the distance measured). What type of erro
A 1.20 102 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.350. What should be the mag
A 240-kg crate is pushed horizontally with a force of 685 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
A pitcher throws a baseball horizontally from the mound to home plate. The ball falls 1.105 m (3.62 ft) by the time it reaches home plate 18.3 m (60 ft) away. How fast was the pitcher's pitch?
An infinitely long line of charge has a linear charge density of 5.00×10-12 C/m. A proton is at distance 19.0 cm from the line and is moving directly toward the line with speed 2000 m/s. How
A 2840 kg truck has a velocity of 8.3 m/s and comes to a stop in 15 s. What is the initial velocity, final velocity, initial momentum and final momentum?
A wheel rotating about a fixed axis has an angular position given by q = 3.0 - 2.0t3, where q is measured in radians and t in seconds. What is the angular acceleration of the wheel at t = 2.0 s?
A projectile is shot from the edge of a cliff 140 m above ground level with an initial speed of 100 m/s at an angle of 37 degrees with the horizontal. Determine the time taken by the projectile to h
A 4.00-kg model rocket is launched, expelling 46.0 g of burned fuel from its exhaust at a speed of 590 m/s. What is the velocity of the rocket after the fuel has burned? Hint: Ignore the external f
A sled weighing 1.0 X 10^2 N is held in place on a frictionless 20.0 degree slope by a rope attached to a stake at the top. The rope is parallel to the slope. What is the normal force of the slope
A skier leaves the ramp of a ski jump with a velocity of 12.3 m/s, 12.4° above the horizontal. The slope is inclined at 48.6°, and air resistance is negligible. Calculate the distance from t
A force of 6.55 N acts on a 3.4 kg object for 24.8 seconds. What is the object's change in momentum? Answer in units of N S.
A rifle is aimed horizontally at a target 58 m away. The bullet hits the target 2.0 cm below the aim point. What was the bullet's flight time?
A solid sphere of uniform density starts from rest and rolls without slipping a distance of d = 4 m down a q = 25° incline. The sphere has a mass M = 4 kg and a radius R = 0.28 m. awhat is the t
Assuming ideal frictionless conditions for the apparatus what is the acceleration of the system if m1= .25 kg, m2= .50 kg, and m3= .25 kg?
Derive a formula predicting the percentage an object submerged in water. The formula should be expressed as a ratio in terms of the volume of the block, and the volume of displace water. The result
Using Newton's laws, calculate , the magnitude of the normal force that the floor exerts on the chair.
A 3 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.2 m/s2, find the force exerted by the rope on the bucket of water.
Two horizontal forces, 244 N and 161 N, are exerted on a canoe. If the these forces are applied in the same directions, find the net horizontal force on the canoe?
A gorilla weighs 8.00x10^2N and swings from vine to vine. As the gorilla grads a new vine, both vines make an angle of 30 degrees with the verticle. In such a condition of static equillibrium what
What would happen to the olubility of potassium chloride in the water as the water temprature increased from 25 degrees celsius to 75 degrees celsius?