An automobile traveling on a straight, level road at 15 km/h speeds up to 90 km/h in 50 s. What was the magnitude of the auto's acceleration, in meters per second squared?

What is the amount of effort required to lift up 600N load by using a lever of one meter length whose fulcrum is 20cm far from load? Efficiency=75%

The density of un-set concrete is 2.40 x 10 3 kg/m 3. When a block with volume 0.0708 m 3 is submerged in the liquid, a force of 66.7 N is needed to keep it from sinking. a. Find the weight of the block.

How is the acceleration of a car traveling on an elevated air track related to the angle of elevation

Which type of galaxy has a little rotation, but not enough to flatten out? A. spiral B. elliptical C. barred spiral

A disk with a hole has inner radius rin and outer radius rout. the disk is uniformly charged with total charge q. find an expression for the on-axis electric potential at distance z from the center of the disk

A plane on the ground will weigh: A) more than a plane in the air B) less than a plane in the air C) the same as a plane in the air

Tsunami waves have? 1. no crests 2. no troughs 3. long wavelengths 4. short wavelengths

The distance between a charge and the source of an electric field changes from 3 mm to 6 mm. As a result of the change, the electric potential energy of the charge is A. divided by 6 B. divided by 2 C. multiplied by 2 D. multiplied by 6

if an object is at rest and experiences a force of 100 to the right and 50N to the left which way will the object accelerate?

Determine the kinetic energy of 1000-kg roller coaster car that is moving with speed of 20.0m/s