No. A neutron star is the weird remains of a star that blew its outer layers off in a nova event, and then had enough mass left so that gravity crushed its electrons into its protons, and then what was left of it shrank down to a sphere of unimaginably dense neutron soup. But it didn't have enough mass to go any farther than that.
A black hole is the remains of a star that had enough mass to go even farther than that. No force in the universe was able to stop it from contracting, so it kept contracting until its mass occupied no volume ... zero. It became even more weird, and is composed of a substance that we don't know anything about and can't describe, and occupies zero volume.
Contrary to popular fairy tales, a black hole doesn't reach out and "suck things in". It's just so small (zero) that things can get very close to it. You know that gravity gets stronger as you get closer to an object, so if the object has no size at all, you can get really really close to it, and THAT's where the gravity gets really strong. You may weigh, let's say, 100 pounds on the Earth. But you're like 4,000 miles from the center of the Earth. What if all of the earth's mass was crammed into the size of a bean. Then you could get 1 inch from it, and at that distance from the mass of the Earth, you would weigh 25,344,000,000 pounds. But Earth's mass is not enough to make a black hole. That takes a minimum of about 3 times the mass of the sun, which is right about 1 million times the Earth's mass. THEN you can get a lightweight black hole. Do you see how it works now ?
I know. It all seems too fantastic to be true. It sure does.
The direction of the contact forces acting on a body is not necessarily perpendicular to the contact surface. The resolution of contact forces in two components i.e. perpendicular to contact surface and along surface. Perpendicular component is normal force and parallel component is friction.
