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Radda [10]
3 years ago
15

A 4148-kg truck traveling with a velocity of 12 m/s due east collides head-on with a 898-kg car traveling with a velocity of 40

m/s due west. The two vehicles stick together after the collision. Determine the momentum of the 4148-kg truck and the 898-kg car prior to the collision.
Physics
1 answer:
PIT_PIT [208]3 years ago
7 0

Answer:

49776 kgm/s

- 35920 kgm/s

Explanation:

Consider east direction as positive direction of motion and west as negative direction of motion

M = mass of the truck = 4148 kg

V = velocity of the truck in the east direction = 12 m/s

P = Momentum of the truck = ?

Momentum of the truck is given as

P = M V

P = (4148) (12)

P = 49776 kgm/s

m = mass of the car = 898 kg

v = velocity of the car in the west direction = - 40 m/s

p = Momentum of the car = ?

Momentum of the truck is given as

p = m v

p = (898) (- 40)

p = - 35920 kgm/s

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The lowest constant acceleration needed for takeoff from a 1.80 km runway is 2.8 m/s².

To find the answer, we need to know about the Newton's equation of motion.

<h3>What's the Newton's equation of motion to find the acceleration in term of initial velocity, final velocity and distance?</h3>
  • The Newton's equation of motion that connects velocity, distance and acceleration is V² - U²= 2aS
  • V= final velocity, U= initial velocity, S= distance and a= acceleration
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  • So, 100²-0= 2×a×1800

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=> a= 10000/3600 = 2.8 m/s²

Thus, we can conclude that the lowest constant acceleration needed for takeoff from a 1.80 km runway is 2.8 m/s².

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Answer:

2.75 m/s^2

Explanation:

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We can find the acceleration by using the equation: a = (v-u)/t

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