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☆☆☆☆☆Cards in this guide (14)
Momentum is defined as the rate at which work is done true or false
False
Which form of energy is due to the movement of electrons
ELECTRICAL
Is it bad if you have a heavy period on one month and a light one the next month
No it is not bad, as some ladies have a heavy period for one month and then a light one or they may have two heavy periods and then one light one also.
What are expressions for impulse
Impulse = mv
Impulse = Fmv
If you want to lift a 5 kg box to a height of 2 meters how much work must be done
C.50 j
When only mechanical energy acts on an object what is conserved
gravity
What is an example of conditions not producing work
the momentum must be greater than the force . the force may be very large
Spaceship 1 and Spaceship 2 have equal masses of 150 kg Spaceship 1 has a speed of 0 and Spaceship 2 has a speed of 6 They collide and stick together What is their speed
3 m/s
In a collision a vehicle that rebounds off the object it trikes experiences less force than if it crumples assuming the time is the same in both situations
false
If the force moving an object points at least partially in the opposite direction of the object's motion what is the work considered to be
negative
How long can you car be parked along freeway before towed
Four hours
How much work must be done on a 5kg snowborad to increase its speed from 2ms to 4ms
1500 j
What is the Ideal Mechanical Advantage when a screwdriver with a handle of radius 1.2 cm is used to remove a screw in the back of a computer and the screw moves out 0.20 cm on each turn
There is no advantage whether the handle is 1.2 cm or 10 cm, the screw will still only make one revolution. The reason being is that both the screw driver and the screw become part of the whole. The only increase in the screws revolutions is if the screw driver is geared to make more than one turn of the screw.
How much must be done for a 100-kg car to increase its speed from 1ms to 2ms
10kg
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