If the speedometer on a car indicates a constant speed, can you be sure the car is not accelerating? Explain

Which statement is true because of Newton's second law? When the net force on an object decreases, the object's acceleration increases.

Jogger A has a mass m and a speed v, jogger B has a mass m/3 and a speed 3v, jogger C has a mass 4m and a speed v/3, and jogger D has a mass 3m and a speed v/2. Rank the joggers in order of increasing kinetic energy. Indicate ties where appropriate.

A worker does 25 J of work lifting a bucket, then sets the bucket back down in the same place. What is the total net work done on the bucket? a. - 25 J c. 25 J b. 0 J d. 50 J

As a bike accelerates from rest, it gains

Which sets of data show a wave with the shortest wavelength? A. Speed=100 million m/s and frequency = 50 million Hz. B. Speed=150 million m/s and frequency=1500 Hz C. Speed=300 million m/s and frequency = 100 Hz

A motorist driving at 25 meters/second decelerates to 15 meters/second. The combined mass of the vehicle and the driver is 1.5 * 10³ kilograms. What is the amount of mechanical work done by the vehicle?

All forces are different each exerts a particular type of effect on an object

Witch statement about polymers is true

Two bullets have masses of 3,0 g and 6.0g, respectively. both are fired with a speed of 40.0 m/s. Which bullet has more kinetic energy? What is the ratio of their kinetic energies

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?