How should the student modify the setup to investigate how a motor works? A. Attach a crank or use a student finger to force the coil of wire to rotate.

B. Remove the magnet from the model.

C. Place an iron nail inside the coil of wire.

D. Replace the lamp with a battery.

In which situation is the acceleration of a car negative? question 5 options: a)the velocity of a car was 75 km/hr over 4 hours. b)the velocity of a car reduced from 50 km/hr over one minute. c)the velocity of a car increased from 40 km.h to 75 km/h over 15 minutes. d)the velocity of a car was 45 km/hr at 2: 00pm and at 4: 00pm its velocity was 85 km/ht.