Which would most likely cause acceleration? check all that apply. flat road, wind, water movement, hill, or stop light.

answer: wind, water movement, hill and stop light.

acceleration is rate of change of velocity. it is a vector quantity. it means it has both magnitude as well as direction. it depends upon velocity. so, whenever there is change in speed or direction of motion, acceleration is caused.

on a flat road, it is not likely for occurrence of acceleration as there would be no turns, no change in direction. so, unless driver changes speed or reverses the vehicle, the car would not accelerate.

in case of wind, water movement, the vehicle is likely to accelerate as most likely there would be change in speed of the vehicle.

hills have curved roads, so direction changes every now and then causing acceleration of the vehicle.

as the vehicle approaches stop light, it is most likely to halt the vehicle by decreasing the speed and causing the vehicle to decelerate and again on green signal accelerate the vehicle to move ahead.

therefore, wind, water movement, hill and stop light most likely cause acceleration.

nah.   i'm just sleepy.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.