since force is mass and acceleration the force needed to knock over a bowling depends on the mass of bowling and it acceleration.
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To get the Earth to move (quake), much force is needed. Pressure is force per unit area.
That really depends on the toaster. Try it out, with your own toaster.
The force needed to keep a 2kg object moving would depend on the acceleration it experiences. In general, you can use the equation F = m * a, where F is the force, m is the mass (2kg in this case), and a is the acceleration. If the object is moving at a constant speed (zero acceleration), then no force is needed to keep it moving.
To accelerate an object twice as fast, you would need to exert twice the force. This is because force is directly proportional to acceleration, as defined by Newton's second law, F=ma. So if you double the acceleration, you must double the force.
A bowling ball would weigh about 38% less on Mercury compared to Earth due to Mercury's lower gravity.