Momentum and Impulse (PowerPoint)
... In an explosion internal forces are responsible for the object breaking apart. Because the pieces impart equal and opposite forces on each other (Newton’s third law) these internal forces cannot provide a net change in momentum so momentum must be conserved in explosions ...
... In an explosion internal forces are responsible for the object breaking apart. Because the pieces impart equal and opposite forces on each other (Newton’s third law) these internal forces cannot provide a net change in momentum so momentum must be conserved in explosions ...
O- Levels : PHYSICS 1 (a) (i) Define power
... A man of weight 880 N stands a distance x from end A. The ground exerts a vertical force FA on the plank at end A and a vertical force FB on the plank at end B. As the man moves along the plank, the plank is always in equilibrium. (i) Explain why the sum of the forces FA and FB is constant no matter ...
... A man of weight 880 N stands a distance x from end A. The ground exerts a vertical force FA on the plank at end A and a vertical force FB on the plank at end B. As the man moves along the plank, the plank is always in equilibrium. (i) Explain why the sum of the forces FA and FB is constant no matter ...
Pressure
... 3–7 ■ FLUIDS IN RIGID-BODY MOTION Pressure at a given point has the same magnitude in all directions, and thus it is a scalar function. In this section we obtain relations for the variation of pressure in fluids moving like a solid body with or without acceleration in the absence of any shear stres ...
... 3–7 ■ FLUIDS IN RIGID-BODY MOTION Pressure at a given point has the same magnitude in all directions, and thus it is a scalar function. In this section we obtain relations for the variation of pressure in fluids moving like a solid body with or without acceleration in the absence of any shear stres ...
ch 8
... Here vB2x – vA2x is the velocity of B relative to A after the collision; according to the equation, this relative velocity equals to vA1x, which is the velocity A relative to B, or the negative of the velocity of B relative to A before the collision. The relative velocity has the same magnitude, but ...
... Here vB2x – vA2x is the velocity of B relative to A after the collision; according to the equation, this relative velocity equals to vA1x, which is the velocity A relative to B, or the negative of the velocity of B relative to A before the collision. The relative velocity has the same magnitude, but ...
Student Class ______ Date ______ MULTIPLE
... never changes, regardless of the position of the object (Earth, moon, other planets etc.). People get confused because they think of the weight (Fg=mg), which depends on mass m but also depends on gravity. Weight does change if you go somewhere else. Therefore the answer is (2). 26. Based on Newton’ ...
... never changes, regardless of the position of the object (Earth, moon, other planets etc.). People get confused because they think of the weight (Fg=mg), which depends on mass m but also depends on gravity. Weight does change if you go somewhere else. Therefore the answer is (2). 26. Based on Newton’ ...
Weightlessness
Weightlessness, or an absence of 'weight', is an absence of stress and strain resulting from externally applied mechanical contact-forces, typically normal forces from floors, seats, beds, scales, and the like. Counterintuitively, a uniform gravitational field does not by itself cause stress or strain, and a body in free fall in such an environment experiences no g-force acceleration and feels weightless. This is also termed ""zero-g"" where the term is more correctly understood as meaning ""zero g-force.""When bodies are acted upon by non-gravitational forces, as in a centrifuge, a rotating space station, or within a space ship with rockets firing, a sensation of weight is produced, as the contact forces from the moving structure act to overcome the body's inertia. In such cases, a sensation of weight, in the sense of a state of stress can occur, even if the gravitational field was zero. In such cases, g-forces are felt, and bodies are not weightless.When the gravitational field is non-uniform, a body in free fall suffers tidal effects and is not stress-free. Near a black hole, such tidal effects can be very strong. In the case of the Earth, the effects are minor, especially on objects of relatively small dimension (such as the human body or a spacecraft) and the overall sensation of weightlessness in these cases is preserved. This condition is known as microgravity and it prevails in orbiting spacecraft.