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Q1. In a head-on collision, a car stops in 0.28 from a speed of 18. The driver has a mass of 73, and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt in the fraction of a second?
Q2. Note the gravitational acceleration of equatorial sea level is g = 32.0088ft/s^2 and that its variation is 0.003ft/s^2/ 1000ft ascent. find the height in miles above its point for which g = 30.504 ft/s^2 and what is the weight of a 180lb man on top of 29,131 ft in mt Everest.
What is the change in kinetic energy of the puck
A cube of ice is taken from the freezer at -8.0°C and placed in a 97 g aluminium calorimeter filled with 286 g of water at room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of the ice cube.
What is water speed along the boat during the vertical cross
While a roofer is working on a roof that slants at 39.0 degrees above the horizontal, he accidentally nudges his 93.0 N toolbox, causing it to start sliding downward, starting from rest.
What was the average acceleration throughout the trip
A curve of radius 40 m is banked for a design speed of 100 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely create the curve?
Two meteoroids are heading for earth. Their speed as they cross the moon's orbit is 2.3 km/s. The second meteoroid misses for earth by 2680 km. What is its speed at its closest point.
What is weight of the parachutist
A 75-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.5 cm in diameter. Find out the pressure exerted on the floor by each leg of the chair; assume the weight is evenly distributed.
How numerous extra electrons are on this particular oil drop (given the presently known charge of the electron)?
The effects of the spin of the earth
What is magnitude of the greatest force
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