The force required to stretch a Hooke’s-law spring varies from 0 N to 75.2 N as we stretch
the spring by moving one end 13.6 cm from
its unstressed position.
1.) Find the force constant of the spring.
Answer in units of N/m.
2.) Find the work done in stretching the spring.
Answer in units of J.

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?