Forces and Motion:Question 2 Student 1 rides in a moving car and observes a bus traveling east. She estimates
that it is traveling at a rate of 20 kilometers per hour (km/h). Student 2 is standing
on the sidewalk and observes the same bus at the same time. She estimates that
it is moving east at a rate of 50 km/h.
Bus
Student 1
Student 2
Which best explains this difference?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.