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Question
1. A runner is running on a circular track that is 200 m in circumference. Find out the magnitude of his acceleration in m/s2 when he is running at a constant speed of 8.0 m/s.
2. A 529 kg automobile slides across an icy street at a speed of 66.0 km/h and collides with a parked car that has a mass of 856 kg. The two cars lock up and slide together. What is the speed of two cars just after they collide?
3. A ball with mass 3.5 kg is thrown horizontally with a velocity of 6.9 m/s at a cart of mass 21.3 kg. The ball bounces back with a velocity of -2.971 m/s. The collision is not elastic. Friction between cart and road surface can be neglected. What is the final velocity of the cart?
4. A 230 kg satellite is orbiting on a circular orbit 6870 km above the Earth's surface. Find out the speed of the satellite. (The mass of the Earth is 5.98×1024 kg, and radius of the Earth is 6370 km.)
5. A mechanic can exert the most force of 26 N. He has a wrench of length 0.8 m. What is the greatest torque he can concern to a bolt using that wrench?
A small turtle moves at a speed of 165 furlongs per fortnight. Find out the speed of the turtle in centimeters per second. Note that 1 furlong = 220 yards and 1 fortnight = 14 days.
A mass M=171 kg is suspended from the end of a uniform boom. The boom (mass=69.0 kg, length=3.60 m) is at an angle %u03B8=69.0 deg from the vertical, Calculate the tension in the horizontal cable
A 0.500 kg hammer is moving horizontally at 6.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. Calculate the duration of the impact
The skier's mass is 59.0 kg, and the coefficient of kinetic friction between the skis and the snow is 0.100. Find out the magnitude of the force that the tow bar exerts on the skier.
A 1,576-kg car is moving down a road with a slope (grade) of 11% while slowing down at a rate of 3.6 m/s^2. find direction and magnitude of the frictional force
In a women's 100-m race, accelerating uniformly, Laura takes 1.87 s and Healan 3.12 s to attain their maximum speeds, which they each maintain for the rest of the race.
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, find the oxygen concentration at the interior end of the tube
Calculate the molar Sakur-Tetrode entropy of gaseous argon at 25 C and atmospheric pressure
Rank the vector combinations on the basis of their angle, measured counterclockwise from the positive x axis. Vectors parallel to the positive x axis have an angle of 0 . All angle measures fall between 0 and 360. Rank from largest to smallest. To..
Suppose that we align a compass needle with the horizontal component of the Earth's magnetic field, What is the size of the horizontal component of the Earth's magnetic field
X-rays having an energy of 250 keV undergo Compton scattering from a target. Find the Compton shift at this angle
Dave needs to get groceries from the store, which is a distance of D=2.8km east of his house, What is the direction of Dave's displacement for the entire trip
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