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Q. A projectile is fired straight upward at 141 m/s. How fast is it moving at the instant it reaches the tip of its trajectory? Suppose instead that it were fired upward at 45 degrees. What would be its speed at the tip of its trajectory?
Q. An alpha particle (charge 2e) is sent at high speed toward a gold nucleus. The electric force acting on the alpha particle is 91 N when it's 2.00 x 10^(exponent)-14m away from the gold nucleus What is the charge on the gold nucleus, as a whole number multiple of e? (e= 1.60 x 10^-19. kc= 8.99 x 10^9).
Guess scale factor of the Universe
A board is 6 meters long. The center of mass is in the 2 meters from the left end. The board has a weight of 320 Newton's. How much force in Newtons is necessary to lift the right end while the other end stays on the ground.
A massless rod of length 1m has a 2.00 kg mass attached to one end and a 3 kg mass attached to the other. The system rotates about a fixed axis perpendicular to the rod that passes through the rod 30.0 cm from the end with the 3kg mass attached. The ..
find out the magnitude of an acceleration
A 1600 kg car starts from rest at A, coasts 180m through a dip and comes to stop at B after coasting a distance d on level ground. If the rolling resistance is a constant force of 280N, conclude the distance d.
Compute the momentum of the bullet
It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes.
You have just built a house out in the country and it comes to your attention that you need to install a lightning rod. Being naturally curious you ask a hardware salesperson how lightning rods work and they accurately tell you.
The object is authorized to move on a horizontal frictionless surface. The object is released from rest when the spring is compressed 0.15 m. Find out the force on the object.
What is an actual mechanical advantage of the system
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, while the second piece moves northwest at 14 meter per second. Find the velocity of the third piece?
An insulated Thermos contains 145 cm3 of hot coffee at 89.0 °C. You put in an 11.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once the ice has melted and equilibrium is reached? Treat c..
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