Physics Solutions Library

Physics Solutions Library

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2,786 solutions

Unit Vectors

Q. What is the sum of the following four vectors in (a) unit-vector notation, and as (b) a magnitude and (c) an angle? 

Solved • Nov 6, 2019

Projectile Motion: Horizontal & Negative Launch

Q. A dart is thrown horizontally with an initial speed of 10 m/s toward point  P, the bull’s-eye on a dart board. It hits at point Q on the rim, verti...

Solved • Nov 6, 2019

Vector Product (Cross Product)

Q. Displacement d1 is in the yz plane 63.0° from the positive direction of the y-axis, has a positive z component, and has a magnitude of 4.50 m. Disp...

Solved • Nov 5, 2019

Uncertainty

Q. The cubit is an ancient unit of length based on the distance between the elbow and the tip of the middle finger of the measurer. Assume that the di...

Solved • Oct 23, 2019

Units & Conversions

Q. Hydraulic engineers in the United States often use, as a unit of volume of water, the acre-foot, defined as the volume of water that will cover 1 a...

Solved • Oct 23, 2019

Motion Of Multiple Objects

Q. At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.2m/s2. At the same instant a truck, travelin...

Solved • Sep 25, 2019
Conservation of Energy in Rolling Motion

Q. A size-5 soccer ball of diameter 22.6 cm and mass 426 g rolls up a hill without slipping, reaching a maximum height of 6.50 m above the base of the...

Solved • Mar 18, 2019