2. In the neuromuscular junction, acetylcholine... diffuses across the synaptic cleft and binds to acetylcholine receptors on the postsynaptic muscle fiber. is actively transported across the synaptic cleft and binds to acetylcholine receptors on the postsynaptic muscle fiber.. In the neuromuscular junction, acetylcholine... diffuses across the synaptic cleft and binds to acetylcholine receptors on the postsynaptic muscle fiber. is actively transported across the synaptic cleft and binds to acetylcholine receptors on the postsynaptic muscle fiber.
B. 10,400 N D. 399 N. C___ 2. If a car is moving to the left with constant velocity, one can conclude that. A. there must be no forces applied to the car. B. the net force applied to the car is directed to the left. C. the net force applied to the car is zero. D. there is exactly one force applied to the car. A___ 3.
Best Answer: The 3rd answer is the correct one. Since the velocity is constant, there is no change in velocity, thus zero acceleration. To actually say that there are no forces acted on the car is wrong assumption. the force direction to the left (thrust) is there but it has been eliminated by the force acted to the right (friction). Thus, the net force equal to zero. Based on F=Ma, there will be no acceleration, in other word, no change in velocity, constant velocity. If they were not, Newton's second law (F = ma) would apply and the car would accelerate changing the velocity. so 3 is correct.