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Calculate the spring's elastic constant. If the 50 N load were replaced with a 80 N weight, how far would the spring stretch?
Will the center of mass of this system be (1) nearer to the 4.0 kg mass, (2) nearer to the 6.0 kg mass, or (3) at the center of the rod? Why?
A spring is compressed 10 cm by pushing a body against it. When released the spring pushes the body towards another identical spring.
A 16 g rifle bullet traveling 150 m/s buries itself in a 4.0 kg pendulum hanging on a 3.3 m long string, which makes the pendulum swing upward in an arc.
The by Pass Ratio of the JT9D-3A engine is 5.17:1. If the air mass flow through the fan is 577 kg/s, determine the air mass flow through the core.
A hoop of radius 0.5 m and a mass of 0.2kg is released from rest and allowed to roll down an inclined plane.
A 75 kg athlete does a single handstand. If the area of the hand is in contact with the floor is 125 cm^2, what pressure is exerted on the floor?
A safe with a mass of 150kg is at rest on the floor. what is the minimum horizontal force needed to move the safe if the coefficent of static friction.
Assuming the same braking force, what distance does this car require to stop when it is traveling twice as fast?
By what factor should the tension in this string be changed to produce waves with a speed of 32 m/s?
How large is the coefficient of kinetic friction if the plane make an angle of 25 degrees with the horizontal?
An 79.1 kg astronaut is working on the engines of his ship, which is drifting through space with a constant velocity.
Parts a to d are independent questions, each referring to the initial situation. What is the period if:
Determine the maximum height on the wall to which the firefighter can project water from the hose, is the speed of the water at the nozzle is v_C=48f/s.
The elastic rope obeys Hooke's law. Find how much the rope is extended beyond its unloaded length when the performer hangs at rest.
At this instant your opponent is 10 m away from the ball. He begins moving away from you.
If the tension is increased to 450N, what is the new fundamental frequency?What is the speed of a wave on this string?
A binary star system consists of two stars, each of mass M, orbiting around their common center of mass with radii R from the center of mass.
A diver runs horizontally with a speed of 1.20 m/s off a platform that is 10 m above the water. What is his speed just before striking the water?
What is the horizontal distance between the end of the rifle and the bull's eye?
What is the magnitude of the horizontal force that should be applied to the lower block, so that it just begins to slide out from under the upper block?
A tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts.
What is the difference between mass and weight? Discuss the units of each quantity, what each physically measures and the relationship.
A massless spring is hanging vertically and unloaded, from the ceiling. A mass is attached to the bottom end and released.
Two wires are parallel, and one is directly above the other. Each has a length of 50.0 m and a mass per unit length of 0.020 kg/m.