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Q. For a spring-mass oscillator, if you triple the mass but keep the stiffness the same, by what numerical factor does the period change? That is, if the original period was T and the new period is bT, what is b? It is useful to write out the expression for the period and ask yourself what would happen if you tripled the mass.
Q. A curve of radius 65 m is banked for a design speed of 110 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely make the curve?
A golf ball is struck with a five iron on level ground. It lands 92.7 away 4.10 later. What were (a) direction and (b) magnitude of the initial velocity.
Two non conservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long climb. What is the transform in the car's kinetic energy, ΔKE = KEf - KE0, from A to B.
A bowling ball with a mass of 6.8 kg strikes a stationary pin that has a mass of 1.6 kg. After the collision, the pin flies forward (in the positive x direction) with a speed of 7.3 m/s, and the ball continues forward at 3.2 m/s (in the positive x..
Presume that you loft the ball with the initial speed of v = 17.6m/s, at an angle of θ = 50.7° above the horizontal. At this instant your opponent is d = 11.19m away from the ball. He begins moving away from you 0.35s later, hoping to reach the ba..
A person who weighs 68 kg steps onto a spring scale in the bathroom, and spring compresses by 0.79cm. (a) what is the spring constant? (b) What is the weight of another person who compresses the spring by 0.34cm.
A 60.0-kg skater begins a spin with an angular speed of 6.0 rad/s. By changing the position of her arms, the skater decreases her moment of inertia by 50%. Find the skater's final angular speed?
A constant horizontal force Fa pushes a 3.70 kg FedEx package across a frictionless floor on which a xy coordinate system has been drawn. it gives the package's x and y velocity components versus time t. (The vx axis is marked in increments of 1.2..
A 5.00 x 10^4 kg space probe is travelling at a speed of 14000 m/s through deep space. Retrorockets are fired along the line of motion to decrease the probe's speed. The retrorockets generate a force of 4.00 x 10^5 N over a distance of 2600 km. What ..
What is diameter of the circle
Old MacDonald had a farm, and on that farm he had a gate (see below). The gate is 3m wide and 1.8m high, with hinges attached to the top and bottom. The guy wire makes an angle of 300 with the top of the gate and is tightened by a turn buckle to a..
lady ate a whole medium size pizza storing up 120 food Calories. This energy is used to heat up 2 liters of water from a certain initial temperature to a final temperature of 80 deg.C, what was the initial temperature of the water?
If a person radiates about 66 W of power at room temperature, how long does it take for person to radiate away the energy acquired by consuming a 230 Calorie doughnut.
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