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A car starts from rest on a curve with a radius of 190 m and accelerates at 1.30 m/s^2. How many revolutions will the car have gone through when the magnitude of its total acceleration is 2.40 m/s^2
A bucket of mass 2.50 kg is whirled in a vertical circle of radius 1.45 m. At the lowest point of its motion the tension in the rope supporting the bucket is 33.0 N. Find the speed of the bucket, an
A ball of radius 0.200 m rolls with a constant linear speed of 3.39 m/s along a horizontal table. The ball rolls off the edge and falls a vertical distance of 2.00 m before hitting the floor. What i
How much energy is needed to pop 95.0 grams of corn if 14 percent of a kernel's mass consists of water? Assume that the latent heat of vaporization for water at 175 degrees Celsius.
A 1100 kg car rounds a curve of 59 m banked at an angle of 18 degrees. If the car is traveling at 98 km/h, will a friction force be required? If so, in what direction?
Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. In a typical strike, the chameleon's tongue accelerates at a remarkable 250 m/s^2 for 20 ms, then t
A 15 g bullet traveling at 489 m/s strikes an 0.82 kg block of wood that is balanced on a table edge 0.82 m above the ground. If the bullet buries itself in the block, find how far along the ground
Find the total mechanical energy of the ball when it is a height h above the equilibrium position of the spring. Assume that h < h_{rm max} , so that the ball has some velocity v.
A 2.70 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.22
Find the magnitude and direction of the initial velocity. Express the direction as an angle with respect to the +x axis.
If light with this intensity and wavelength enters the eye when the pupil is open to its maximum diameter of 7.5 mm, how many photons per second enter the eye?
At one instant a bicyclist is 75 m due east of a park's flagpole, going due south with a speed of 12 m/s. Then, 25 s later, the cyclist is 45 m due north of the flagpole, going due east with a speed
A football player runs directly down the field for 19 mbefore turning to the right at an angle of 29 from his original direction and running an additional 24 m before being tackled. a) What is the
A school yard teeter-totter with a total length of 5.4 and a mass of 36 is pivoted at its center. A 16 child sits on one end of the teeter-totter. Where should the parent push with a force of 330?
Find the maximum height reached by the rocket. Ignore air resistance and assume a constant acceleration due to gravity equal to 9.80. Write your answer numerically in units of meters.
A laser beam is directed at the top mirror from the left edge of the bottom mirror. What is the smallest angle of incidence with respect to the top mirror, such that the laser beam.
A small grinding wheel has a moment of inertia of 4.0×10-5 {rm kg}cdot{rm m^{2}}. What net torque must be applied to the wheel for its angular acceleration to be 150 {rm rad}/{rm s^{2}}?
The pulse makes four trips down and back along the cord in 0.650 s. What is the tension in the cord? Your answer differs from the correct answer by 10% to 100%.
A force vector points at an angle of 52° above the +x axis. It has a y component of +290 newtons. Find (a) the magnitude and (b) the x component of the force vector.
A 5/8 inch (inside) diameter garden hose is used to fill a round swimming pool 6.1m in diameter. How long will it take to fill the pool to a depth of 1.2m if water issues from the hose at a speed
An airplane flies 200 km due west from city A to city B and then 240 km in the direction of 33.5° north of west from city B to city C. In straight-line distance, how far is city C from city A?
A 50.0g hard-boiled egg moves on the end of a spring with force constant k = 25.0 N/m. Calculate the magnitude of the damping coefficient b.
There are four charges, each with a magnitude of 1.5 µC. Two are positive and two are negative. The charges are fixed to the corners of a 0.26 m square, one to a corner, in such a way that the
A uniform plank of length 2 L is balanced at its center of mass. A mother with a mass of 50 kg sits at a distance L/5 from the center of mass and is balanced with her child sitting at the opposite e
This spark is caused by the movement of electrons through the air between the battery terminals. In what direction are the electrons traveling?