Loop the Loop

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Sinking the 9-Ball

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Finding initial speed and velocity: Horizontal Projection

An object is thrown horizontally from the top of a building at a height of 32.5 m above the ground, it hits the ground 65m from the base of the building. What is the initial speed? What is the velocity just before it hits the ground? I need this in vector form (i-j) form because velocity is a vector

Translational Equilibrium

A leg and cast weighs 220 N (w1) The leg held in traction by two weights (w2 and w3) attached to strings and applies in order that there be no force exerted on the hip joint J by the leg in the cast. (In other words the leg is in translational equilibrium) what are the numerical values of w2 and a for this to happen if w3=110 N? ...continues

Physics: Spring Scale Question

A 6.30 kg mass hanging from a spring scale is slowly lowered onto a vertical spring, as shown in the figure (*please see attachment) A. What does the spring scale read just before the mass touches the lower spring? B. The scale reads 16.0 N when the lower spring has been compressed by 2.70 cm. What is the value of the spring ...continues

Physics: Collision (Elastic versus Inelastic)

A package of mass m is released from rest at a warehouse loading dock and slides down a 3.0-m high frictionless chute to a waiting truck. Unfortunately, the truck driver went on a break without having removed the previous package, of mass 2m, from the bottom of the chute. A. Suppose the packages stick together. What is their ...continues

Potential Energy Diagram Problem

The figure is the potential-energy diagram for a 500 g particle that is released from rest at A (*please see attachment for figure). What are the particle's speeds at B, C, and D?

Problem 10.14

Please see the attached file.

4 Problems

1. A woman 168cm tall stands in front of a plane mirror attached to a vertical wall. What is the minimum length that the mirror must have for the woman to see her entire height? 2. Water in a fish tank is 38cm deep, and a coin rests on the bottom. How far below the surface does the coin appear to be when viewed from above? (A ...continues

2 physics problems

1. If there is a maximum frictional force between your shoe and the track, does that set a limit on how fast your can start (accelerate) in sprint? Does that mean you cannot have more than a certain acceleration even if your have increduly strong leg muscles? What is done to solve this problem? 2. Explain why friction is impo ...continues