Answer:
It have 1.359 joule kinetic energy.
Explanation:
- Kinetic energy is defined as the energy of any object due to its state of motion.
- Mathematically kinetic energy can be calculated as:
K.E = 
...........................equation 1
where,
m= mass of object
v= velocity of that moving object
mass= 2500 lbs = 
kg.
velocity= 80mph= 
= 
.
- Substituting the values in equation 1, we get;
K.E= * * 
K.E= 
F = force applied to stop the car = - 3000 N
m = mass of the car = 3000 kg
a = acceleration of the car = ?
v₀ = initial velocity of the car before the force is applied to stop it = 10 m/s
v = final velocity of the car when it comes to stop = 0 m/s
d = stopping distance of the car
acceleration of the car is given as
a = F/m
inserting the values
a = - 3000/3000
a = - 1 m/s²
using the kinematics equation
v² = v²₀ + 2 a d
inserting the values
0² = 10² + 2 (-1) d
0 = 100 - 2 d
2 d = 100
d = 100/2
d = 50 m
hence the correct choice is
C. 50 m
Answer:
I think D. maybe C
Explanation:
newtons is force of gravity and grams can be weight or mass in the metric system
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