When you bend over, a series of large muscles, the erector
spine, pull on your spine to hold you up. (Figure 1) shows a
simplified model of the spine as a rod of length L that pivots at
its lower end. In this model, the center of gravity of the 360N
weight of the upper torso is at the center of the spine. The 170N
weight of the head and arms acts at the top of the spine. The
erector...
If you wish to lose weight, you may rub a balloon on your head. If you charge the balloon to a charge of q = -1.23µC, how much weight did you lose? The mass of an electron is 9.11 × 10-31 kg.
Weight: 131 lbs Female Height: 5 ft 2 inches Calculate, showing the math, your Body Mass Index (BMI) using the formula 'weight in kilograms divided by height in meters squared' (kg/m^2). Note: Weight in pounds divided by 2.2 = weight in kg and height in inches times .0254 = height in meters. The number is absolute and not a percentage. Based on your BMI, are you underweight, healthy weight, overweight, or obese?
If you bend over, so your trunk is horizontal, the weight of your trunk exerts a rather strong torque about the sacrum, where your backbone is pivoted on your pelvis. Assume that the mass of your trunk (including arms and head) is 47 kg, and that the weight effectively acts at a distance of 0.4 m from the sacrum. What is the torque that this weight exerts? N·m
As part of her morning jog, a 65-kg woman runs up a flight of steps with a vertical height of 10 meters. She accomplishes this task in 15.0 seconds. a) What is the weight of the woman? b) How much work did the woman use to climb the stairs? c) What is her increase in potential energy? d) How much power did she use to climb the stairs? e) How much horsepower did she use?
The main muscles that hold your head upright attach to your
spine in back of the point where your head pivots on your neck. The
figure provided shows typical numbers for the distance from the
pivot to the muscle attachment point and the distance from the
pivot to the center of gravity of the head. The muscles pull down
to keep your head upright. If the muscle relaxes—if, for instance,
you doze in one of your classes besides Physics—your head...
You take the opportunity to stock up on snacks and head on your way. You wind along the road for quite some time before you find a very dark site and pull of onto dirt road. About 100 meters up the road your passage is stopped by a metal gate. The gate consists of a single heavy bar stretching 6 meters across the road. It looks like schedule 5 stainless steel pipe, of all things, clocking in at about 7...
You are holding ball at the height of 1.5 meters m = 2 kg h = 1.5 m You are holding a 2 kg ball at 1.5 meters. What is the mechanical energy at the 1.5 m height and what is the mechanical energy at 0, in other words what is the mechanical energy at release and what is the mechanical energy at impact. What is the velocity at the impact?
10. We measure head weight of 50 humans and find that the average head weight is 3.75kg with a standard deviation of 0.56kg. Find t*. the answer is t* = -12.63 , i want to know how to do this though Assuming your alpha was 0.05, what is the t-table value for the human head data? t = 2.021 (remember to round down for the df, df = 49 so look up df = 40) What is your decision about...
Solution please
A 22 kg hay bale is lifted to a height of 22 meters and then released to fall freely. What are the potential energy and kinetic energy at 16 meters above the ground? Potential Energy Joules Kinetic Energy Joules