Answer:
Explanation:
The relation between momentum "P" and impulse "I " is given by the impulse momentum theorem given below,
i.e. impulse is equal to change in momentum.
I= ∆P= P₂ - P₁
F∆t=mv₂ - mv₁
here m is the mass of skateboarder= m= 53.6 kg
initial velocity v₁ = 4.45m/s
final velocity v₂ = 0
now impulse is
I =0 - 53.6 x 4.45 = -235.52 kgm/s
here the final momentum is zero as the final velocity is zero and the initial momentum P₁= mv₁ = 235.52kgm/s
now the strong force that is applied for 1.82 seconds can be calculated as
F= - I / t
F = - 235.52/ 1.82 = - 131 N
in second step the weak force that is applied for 5.34 s can be calculated as
F = - I / t = - 235.52 / 5.34 = - 44.6 N
the negative sign of impulse and applied force indicates that the force is opposite to the direction of motion of the skateboarder.
Answer:
Independent, dependent, resistance
Explanation:
An independent variable is the one which is varied to test changes in the dependent variable. In the given experiment, voltage is an independent variable is which is being varied and it's effect on current (dependent variable) is being tested. Resistance being held constant.
According to Ohm's Law, current is proportional to voltage.
V = I R
R is resistance
Answer:
spring 1 has less potential energy
Explanation:
since spring 2 is clampped down further it will have a greater effect but since sping 1 is barely clamped down it wont show as much energy
Answer:
higher temperature of copper.
Explanation:
less specific heat capacity.
