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A steel beam that is 5.00 m long weighs 360 N. It rests on two supports, 3.00 m apart, with equal amounts of the beam extending from each end. Suki, who weighs 590 N, stands on the beam in the cent
A staging that weighs W staging supports a painter weighing 450 N. The reading on the left scale is 450 N and the reading on the right scale is 170 N. What is the weight of the staging?
The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.37 radians/s2. It accelerates for 27.1 s, then maintains a constant angular velocity. Calculate t
At a factory, a noon whistle is sounding with a frequency of 463 Hz. As a car traveling at 78 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the facto
An insulated Thermos contains 200 cm3 of hot coffee at 88 °C. You put a 19.0 g ice cube at its melting point to cool the coffee. By how many degrees has your coffee cooled once the ice has melte
Tarzan swings on a 38.0 m long vine initially inclined at an angle of 33.0? with the vertical. The acceleration of gravity if 9.81 m/s2 . What is his speed at the bottom of the swing if he starts fr
The International Space Station orbits the Earth at an average altitude of 362 km. Assume that its orbit is circular, and calculate its orbital speed. The Earth's mass is 5.97×1024 kg and its
The top of Mt. Everest is 8850 m above sea level. Assume that sea level is at the average Earth radius of 6.38×106 m. What is the magnitude of the gravitational acceleration at the top of Mt.
A uniform plank of length 4.5 m and weight 212 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who we
When an object is rolling without slipping on a horizontal surface, we can approximate the friction force to be zero, so that and are approximately zero and and are approximately constant. Rolling w
A superhero flies 188 m from the top of a tall building at an angle of 24 degrees below the horizon. what is the horizontal component of the superhero's displacement?
Florence the dog who weighs 120 newtons stands on a bathroom scale in an elevator. what is the scale reading when the elevator accelerates downard at 2.0m/s^2?
A 530 kg cannon fires a 12 kg cannonball with a speed of 200m/s relative to the muzzle. The cannon is on wheels that roll without friction. When the cannon fires what is the speed of the cannonball
A 6.20-g lead bullet traveling at 480 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half i
An intergalactic rock star bangs his drum every 1.50 s. A person on earth measures that the time between beats is 2.10 s. How fast is the rock star moving relative to the earth?
A girl delivering newspapers travels 5 blocks west, 6 blocks north, then 9 blocks east. What is the magnitude of her resultant dis- placement?
A(n) 0.55 kg softball is pitched at a speed of 18 m/s. The batter hits it back directly at the pitcher at a speed of 25 m/s. The bat acts on the ball for 0.018 s. What is the magnitude of the avera
A 2.5 syringe has an inner diameter of 5.0mm , a needle inner diameter of 0.28mm , and a plunger pad diameter (where you place your finger) of 1.2cm . A nurse uses the syringe to inject medicine in
A 76 g, 35-{rm cm}-long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 10 g ball of clay traveling horizontally at 2.4 m/s hits and sticks to the very bottom t
A solid spherical conductor has a radius of 15 cm. the electric field 30cm from the center of the sphere has a magnitude of 800N/C. what is the surface charge density on the sphere?
If the dog is pulling the leash at 60 N one way, at what force should Jillian pull on the leash in that same direction to obtain and maintain static equilibrium?
During the initial stage of construction, the beam is not to be bolted to the wall, but to be held in place solely by friction. What is the minimum coefficient of friction between the beam and the w
Two brothers, Jimmy and Robbie, sit 3.00 m apart on a horizontal seesaw with its fulcrum exactly midway between them. Jimmy sits on the left side, and his mass is 42.5 kg. Robbie's mass is 37.0 kg.
A child and sled with a combined mass of 50.0 kg slide down a frictionless hill that is 7.34 m high. If the sled starts from rest, what is its speed at the bottom of the hill?
The bullet passes right through and emerges on the other side with a speed of 100 m/s, and the saxophone is given a speed of 4 m/s. Find the initial speed of the bullet.