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- When a 10,000-rn runner competing on a 400-rn track crosses the finish line, what is the runner’s net displacement? Can this displacement be zero? Explain.In SI units, speeds are measured in meters per second (m/s). But, depending on where you live, you’re probably mole comfortable of thinking of speeds in terms of either kilometers per hour (km/h) or miles per hour (mi/h). In this problem, you will see that 1 m/s is roughly 4 km/h or 2 mi/h, which is handy to use when developing your physical Intuition. More precisely, show that (a) 1.0m/s=3.6km/h and 1.0m/s=2.2mi/h .Explain why a vector cannot have a component greater than its own magnitude.
- A trapper walks a 5.0-lan straight-line distance from her cabin to the lake, as shown in the following figure. Determine the east and north components of her displacement vector. How many more kilometers would she have to walk if she walked along the component displacements? What is her displacement vector?You, are dniving 17 mi/hr. when a dog rns acnss your path. You lam on your breaks and in 3.5 sece vlon 92 mil/nr. What is s the total distamce tamild dyving decielenotionin a circular track circie or radius CAr moving 174 m n 845. in of the centrepetal mis²) completes one calculate the magnitude ecceleration of the Cin cer
- A) is incorrect thats not the radius of the curvatureThis is the wrong answer. Also it needs 3 significant figures. Still wrong. Need to find area under the curve. 1.80 J is also wrong. Not Sure how to answer.Average (1/v) is a. 1/average V b. (2m/tkT)1/2 (TikT/2m)'/2 С. d. (m/2kT)1/2 Clear my choice
- Use dimensional analysis to sole the following problems. A sign in a town gives the speed limit at 50.00 km/hr. What is this speed in cm/sec?A displacement veetor in the ay plane is 15 m long and directed at angle u " 30* in below Figure Deternine (a) the x component and (b) the y componemt of the vector. The x component of vector A is 250 m and the y component is 40 0 m. (a) Whut is the magnitude of A7 (b) What is the angle between the direction of and the positive direction of x? Q2 the unit for Energy, heat and work is ) in St system, comvert this unit to BG usitg convert nule.The acceleration due to gravity, g, is constant at sea level on the Earth's surface. However, the acceleration decreases as an object moves away from the Earth's surface due to the increase in distance from the center of the Earth. Derive an expression for the acceleration due to gravity at a distance h above the surface of the Earth, g₁. Express the equation in terms of the radius R of the Earth, g, and h. &h= Suppose a 91.75 kg hiker has ascended to a height of 1802 m above sea level in the process of climbing Mt. Washington. By what percent has the hiker's weight changed from its value at sea level as a result of climbing to this elevation? Use g = 9,807 m/s² and R= 6.371 x 106 m. Enter your answer as a positive value. weight change =