The change in momentum (and impulse) are still 3000 N*s. Safety devices (like airbags, seatbelts and crumple zones) cause crashe
1 answer:
Answer:
F = 2000 N
Explanation:
According to Newton's Second Law of Motion, the rate of change of momentum is equal to the force applied. Therefore, the formula written below will be used to solve this problem:
where,
F = Force everted = ?
ΔP = Cange in Momentum = 3000 N.s
t = time taken = 1.5 s
Therefore,
<u>F = 2000 N</u>
You might be interested in
Answer:
Approximately assuming no heat exchange between the mixture and the surroundings.
Explanation:
Consider an object of specific heat capacity and mass
. Increasing the temperature of this object by
would require
.
Look up the specific heat of water: .
It is given that the mass of the water in this mixture is .
Temperature change of the water: .
Thus, the water in this mixture would have absorbed :
.
Thus, the energy that water absorbed was: .
Assuming that there was no heat exchange between the mixture and its surroundings. The energy that the water in this mixture absorbed, , would be the opposite of the energy that the metal in this mixture released.
Thus: (negative because the metal in this mixture released energy rather than absorbing energy.)
Mass of the metal in this mixture: .
Temperature change of the metal in this mixture: .
Rearrange the equation to obtain an expression for the specific heat capacity:
. The (average) specific heat capacity of the metal pieces in this mixture would be:
.