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A baseball is thrown at an angle of 25 degrees relative to the ground at a speed of 23.0 m/s. If the ball was caught 42.0 m from the thrower,, how long was it in the air? How high was the tallest s
During a heavy rain, the drops are falling at a constant velocity and at an angle of 10.5° west of the vertical. What is your walking speed if the speed of the drops relative to the ground is 5.
The triangle has to rotate, because otherwise the stars would crash together in the center. What is the period of rotation?
An electron moves at a speed of 6.0 x 10^-6 perpendicular to a constant magnetic field. The path is a circle of radius 1.3 x 10^-3m. What is the magnitude of the field. Find the magnitude of the ele
A 2.2-kg object is suspended from a spring with k = 18 N/m. The mass is pulled 0.35 m downward from its equilibrium position and allowed to oscillate. What is the maximum kinetic energy of the obje
A 1.6 kg cylinder (radius = 0.1 m, length = 0.50 m) is released from rest at the top of a ramp and allowed to roll without slipping. What is its translational kinetic energy?
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
Under the influence of a drive force of 235 N, it is moving at a constant velocity whose magnitude is 4.23 m/s. The drive force is then shut off. Find (a) the distance in which the snowmobile coasts
Calculate the frequency of the damped oscillation. (b) By what percentage does the amplitude of the oscillation decrease in each cycle?
A bucket of mass 1.90 kg is whirled in a vertical circle of radius 1.30 m. At the lowest point of its motion the tension in the rope supporting the bucket is 22.0 N.
The block, with the bullet embedded, slides 5.0 across the table. The coefficient of kinetic friction for wood sliding on wood is 0.20. What is the final speed of the bullet?
The clerk pulls with a force of 178.0 N at an angle of 24° with the horizontal. The box has a mass of 40 kg, and the coefficient of kinetic friction between the box and the floor is 0.45. Find t
The pilot of an airplane traveling 220 km/h wants to drop supplies to flood victims isolated on a patch of land 180 m below, the supplies should be dropped how many seconds before the plane is direc
A baseball pitcher throws a fastball at a speed of 47 m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it through an almost straight-line distance of 3.5 m. Calculate
What is the magnitude of the apparent weight of a 83 kg astronaut 3300 km from the center of the Earth's Moon in a space vehicle moving at constant velocity?
A 1.70 MHz sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. Calculate the speed of the fetal heart wall at the instant this measur
The atomic mass of Neon is 20.2u, and that of krypton is 83.8u. The temperature of the krypton is 293K. What is the temperature of the neon?
What is the maximum height the arrow will attain? The target is at the height from which the arrow was shot. How far away is it?
A 11 g bullet is fired into a 11 kg wood block that is at rest on a wood table. The block, with the bullet embedded, slides 5.0 {rm cm} across the table. The coefficient of kinetic friction for wood
A 16.5 kg gold bar at 27.0°C is placed in a large, insulated 0.800 kg glass container at 15.0°C with 2.00 kg of water at 25.0°C. Calculate the final equilibrium temperature.
A 135-kg cannon at rest contains a 9.5-kg cannon ball. When fired, the cannon ball leaves the cannon with a speed of 115 m/s. What is the recoil speed of the cannon?
A spring (k =805N/m) is hanging from the ceiling of an elevator, and a 5.0-kg object is attached to the lower end. By how much does the spring stretch (relative to its unstrained length) when the el
The ratio of the number of excess electronic charges to the number of molecules on the surface of the tape is the fraction of the molecules on the surface of the tape that have gained (or lost) an e
The plates each have an area of 2 × 10-3 m2, and the spacing between the plates is 6 × 10-3 m. There is no dielectric between the plates. What is the capacitance of the capacitor?
Water flows through a horizontal tube of diameter 3.0 m that is joined to a second horizontal tube of diameter 2.2 . The pressure difference between the tubes is 8.0 kpa . Find the speed of flow in