Question

If an 8 kg mass is pulled up an incline at a constant speed, determine tension if there is no friction between the cord and the pulley.

a) 78.4 N
b) 80 N
c) 76 N
d) 64 N

Answer 1

The tension in the rope when an 8 kg mass is pulled up an incline at a constant speed, with no friction between the cord and the pulley, is 78.4 N.

Step-by-step explanation:

The subject of this question is Physics, specifically related to the concept of tension in a rope during different scenarios involving forces and motion. In the scenario provided, an 8 kg mass is being pulled up an incline at a constant speed, with the requirement to determine the tension in the absence of friction between the cord and the pulley. Assuming that the only force acting on the mass besides tension is gravity, the tension in the rope would be equal to the weight of the mass. Since the mass is 8 kg, the tension would equal the mass times the acceleration due to gravity (8 kg × 9.8 m/s²). This gives a value of 78.4 N (T = m × g).