Can a bullet have the same momentum as a truck?
Yes, for a bullet to have the same momentum as a truck, it must have a higher velocity because the two masses are not the same.
Why does a small bullet have a large momentum?
When the mass is greater (at the same speeds), the momentum is greater. A bullet is an example of an object with a very small mass that has a lot of momentum because it is moving very quickly.
Do bigger objects have more momentum?
The momentum of an object varies directly with the speed of the object. Two objects of different mass are moving at the same speed; the more massive object will have the greatest momentum. A less massive object can never have more momentum than a more massive object.
What has more momentum a car or a truck?
The truck has more momentum than the car. By momentum, we mean inertia in motion. Momentum is the mass of an object multiplied by its velocity. A moving truck has more momentum than a car moving at the same speed because the truck has more mass.
What is the force required to stop a moving object?
Explanation: an external force is required to stop a moving object because the external force creates a sort of friction or a blockage for the moving object helping it to stop.
How much momentum does it take to stop a running back?
Under those circumstances the defender would have three times the momentum of the relatively stationary running back and hit him with roughly two thirds of a ton of force. Defenders running full speed, however, face a risk: the ball carrier could sidestep an overly aggressive player.
Is momentum always conserved?
Collisions. In collisions between two isolated objects Newton’s third law implies that momentum is always conserved. In collisions between two isolated objects momentum is always conserved. Kinetic energy is only conserved in elastic collisions.
Why is momentum not conserved?
Momentum is not conserved if there is friction, gravity, or net force (net force just means the total amount of force). What it means is that if you act on an object, its momentum will change. This should be obvious, since you are adding to or taking away from the object’s velocity and therefore changing its momentum.
Why is momentum always conserved?
The conservation of momentum is simply a statement of Newton’s third law of motion. During a collision the forces on the colliding bodies are always equal and opposite at each instant. These forces cannot be anything but equal and opposite at each instant during collision. Therefore the momentum is always conserved.
Why is momentum conserved but not energy?
Momentum is conserved, because the total momentum of both objects before and after the collision is the same. However, kinetic energy is not conserved. Some of the kinetic energy is converted into sound, heat, and deformation of the objects.
Is energy conserved in an explosion?
Explosions occur when energy is transformed from one kind e.g. chemical potential energy to another e.g. heat energy or kinetic energy extremely quickly. So, like in inelastic collisions, total kinetic energy is not conserved in explosions.
What does it mean when momentum is zero?
An object is said to have zero momentum when either the mass or the velocity is zero. Since the mass of the object cannot be zero, the velocity of the object must be zero for momentum to be zero. Velocity is zero for an object at rest.
How can a photon have energy but no mass?
Light indeed carries energy via its momentum despite having no mass. In contrast, for a particle with no mass (m = 0), the general equation reduces down to E = pc. Since photons (particles of light) have no mass, they must obey E = pc and therefore get all of their energy from their momentum.
How do you get a negative mass?
To create negative mass, the researchers applied a second set of lasers that kicked the atoms back and forth and changed the way they spin. Now when the rubidium rushes out fast enough, if behaves as if it has negative mass.
Why is there no negative mass?
In theoretical physics, negative mass is matter whose mass is of opposite sign to the mass of normal matter, e.g. −1 kg. General relativity describes gravity and the laws of motion for both positive and negative energy particles, hence negative mass, but does not include the other fundamental forces.
Does a positron have negative mass?
If you built a floor on earth out of negative mass of sufficient size, then people above that floor would feel no gravity and would float around. Again, negative mass does not exist, so genuine anti-gravity is not possible. Electrons and positron have the exact same mass, the same spin, and the same charge magnitude.
Does a positron have mass?
The positron or antielectron is the antiparticle or the antimatter counterpart of the electron. The positron has an electric charge of +1 e, a spin of 1/2 (the same as the electron), and has the same mass as an electron.
Can weight be negative physics?
Weight is a vector quantity so it can be either positive or negative, with respect to reference it can be positive or negative.
Is matter positive or negative?
Negative matter is a hypothetical form of matter whose active-gravitational, passive-gravitational, inertial, and rest masses are opposite in sign to normal, positive matter. Negative matter is not antimatter, which as far as is known has normal (positive) mass.
What does antimatter look like?
When you see antimatter depicted in science fiction movies, it’s usually some weird glowing gas in a special containment unit. Real antimatter looks just like regular matter. Anti-water, for example, would still be H2O and would have the same properties of water when reacting with other antimatter.
What is a negative Newton?
This object will move as if it had a single force of 2 Newtons pushing on it toward the left. Forces can be positive or negative. Actually, forces which are aimed to the right are usually called positive forces. And forces which are aimed to the left are usually said to be in a negative direction.
Is dark energy negative energy?
Dark Energy is a hypothetical form of energy that exerts a negative, repulsive pressure, behaving like the opposite of gravity. It has been hypothesised to account for the observational properties of distant type Ia supernovae, which show the universe going through an accelerated period of expansion.