The mass of the car at the given kinetic energy is 920 kg.
The given parameters;
- initial velocity of the car, u = 22 m/s
- kinetic energy of the car, K.E = 222,640 J
Kinetic energy if the energy acquired by a body during its motion. This kinetic energy is the product of average velocity squared and mass of the object.
The mass of the car at the given kinetic energy is calculated as follows;
Thus, the mass of the car at the given kinetic energy is 920 kg.
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The force that the spring exerts is 1.31 N.
<h3>What is Spring force?</h3>
- The displacement (compression or expansion) and force constant of the specific spring determine the spring's force.
- It always takes action to get mass back to where it should be for equilibrium.
- The force applied to the spring and the energy it has stored are shown in the formulas below:
F = kx
Where,
x = displacement in the spring
k = spring force constant
<h3>Calculation of spring force:</h3>
Given,
k = 8.75 n/m
x = 0.150 m
Force exerted by the spring, F = kx
putting the values,
F = 8.75 x 0.150
= 1.3125 N
Hence, the force that the spring exerts is 1.31 N.
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Answer:
a)8.59 m/s
b)-0.8818 m/s²
Explanation:
a) Given the van moved 40 m in 7.70 seconds to a final velocity of 1.80 m/s
Apply the equation for motion;
where
t=time the object moved
d=displacement of the object
Vi=initial velocity
Vf=final velocity
Given
t=7.70s
Vf=1.80 m/s
d=40m
Vi=?
Substitute values in equation
b)Acceleration is the rate of change in velocity
Apply the formula
Vf=Vi+at
where;
Vf=final velocity of object
Vi=Initial velocity of the object
a=acceleration
t=time the object moved
Substitute values in equation
Given;
Vf=1.80 m/s
Vi=8.59 m/s
t=7.70 s
a=?
Vf=Vi+at
1.80=8.59+7.70a
1.80-8.59=7.70a
-6.79=7.70a
-6.79/7.70=7.70a/7.70
-0.8818=a
The van was slowing down.
Answer:
D: 154.7 J
Explanation:
Using the formula for work, the formula is
Force(Newtons) x Distance(Meters)
therefore, 17 x 9.1
and it will be 154.7 Joules: D
Probably because it has a bigger mass or shape. hope this HELPS!!!