A car moves with constant acceieration of -0.s m/s? on a straight portion of the road. Att- 0s the car has a velocity of 69 mph,
1 answer:
Answer:
b) d = 0.71 Km
Explanation:
Car kinematics
Car 1 moves with uniformly accelerated movement
Formula (1)
d: displacement in meters (m)
v₀: initial speed in m/s
vf: final speed in m/s
a: acceleration in m/s²
Equivalences:
1mile = 1609.34 meters
1 hour = 3600s
1km = 1000m
Known data
a = -0.5 m/s²
Distance calculation
We replace data in the Formula (1)
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Explanation:
Energy is the ability of matter to produce work in the form of movement, light, heat, among others.
In this sense, according to the Conservation of Energy principle: <em>"energy is not created or destroyed, it is transformed."</em>
So, in the case of the apple, its total energy is conserved.
When the apple is hanging from a limb, it has zero kinetic energy (because it is at rest) and has gravitational potential energy
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When the apple falls, just before its hits the ground, this gravitational potential energy transforms in kinetic energy (since the apple is moving), which depends on the mass and velocity
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When the apple hits the ground, the gravitational potential energy is zero (h=0) and the kinetic energy transforms into some other form of energy (acoustic energy or thermal energy, for example).