Find the work done in moving an object along a vector r = 3i + 2j - 5k if applied force is f = 2i - j -k

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car