The velocity of a particle of mass 20kg changes from (i-2j-k)m/s to (-2i+j-k)m/s in 5sec. Determine the change in momentum and the force exerted. Ans: 60Ns and 15N

# Category: Physics

For some reason, I am getting close to 9000 for the spring constant for part (a). I’m not sure what the right spring constant is, but this seems unrealistic? For fun, you strap roller skates to a washing machine and let it go at the top of a ramp. It rolls down the ramp and […]

Find an object at home, school, work, or online that has an interesting shape and calculate the object’s rotational inertia. Refer to table 10.2 in lesson 10C for the rotational inertias of various shapes. appreciate the helpThis is the table 10.2:

A cylindrical blood vessel is partially blocked by the buildup of plaque. At one point, the plaque decreases the diameter the vessel by 52%. The blood approaching the blocked portion has speed v0. Just as the blood enters the blocked portion of the vessel, what is its speed v expressed as a multiple of v0

You place a large pebble in a slingshot, pull the elastic band back to your chin, and release it, launching the pebble horizontally at a speed of 100 cm/s. You then repeat the exact same procedure (pulling the elastic band back the same distance) with a smaller pebble. The smaller pebble leaves the slingshot with […]

A). 100 MHz B). 150 Hz C). 1.5 * 10^10 Hz D). 3.6 * 10^8 Hz

A driver holds his hands on opposite sides of the 35-cm-diameter steering wheel in a modern sports car. A torque of 4.5 N⋅m is required to turn the wheel.