Option A, C and D are correct statements.
Explanation:
Torque is the twisting effect of a force which causes an object to acquire angular acceleration.
The direction of the torque depends on the direction of the force on the axis. The SI unit for torque is the Newton-meter.
The net torque is the sum of the individual torques.
If the net torque on a rotatable object is zero then:
1. It will be in rotational equilibrium and the angular velocity of the body remains constant.
2. It will be in rotational equilibrium and not able to acquire angular acceleration. Thus, it will not be able to acquire angular velocity.
3. Angular momentum will be conserved.
If the forces on an object are balanced, the net force is zero.
If there net force on an object is zero, its speed and direction of motion do not change, including if it is at rest, the object will not accelerate and the velocity will remain constant.
The detail from "Justin Lebo” that best shows that Justin is caring, is because of this line:
"They were so happy," Justin remembers. "It was like they couldn't believe it. It made me feel good just to see them happy."
Justin was a ten-year boy who was very caring for the needy. His parents too contributed to him in his generous nature of sharing. He had a great love to ride a bike. He bought an old bike and with the help of his father turned it into a brand new bike. Later, he thought about the boys who lived in Kilbarchan. Making and donating bikes to the boys gave him happiness and encouraged him to do such things more in his life. he started to remake many such bikes and offered them to the boys. When people started to acknowledge his caring nature, they too started to donate old bikes and money to him.