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3 years ago

What is the kinetic energy of a 2000 kg car traveling at a speed of 30 m/s (?65 mph)?

Physics

1 answer:

Brrunno [24]3 years ago

7 0

KE = 1/2mv^2

m = 2000

v = 30m/s

1/2*2000*30^2=

1000*900 = 900,000kgm^2/s^2

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4 years ago

If someone is moving at a constant speed of 100 km/h and accelerate to 120km /h in 10 s what is the acceleration

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3 years ago

Three forces are applied to a solid cylinder of mass 12 kg (see the drawing). The magnitudes of the forces are F1 = 15 N, F2 = 2

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Answer:

The angular acceleration is 11.66 rad/s²

Explanation:

Step 1: Given data

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4 years ago

Suppose Galileo dropped a lead ball (100 kilograms) and a glass ball (1 kilogram) from the Leaning Tower of Pisa. Which one hit

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4 years ago

Read 2 more answers

An object moves from position +34m to the position -15m in 15 seconds. What is the total displacement? What is the total velocit

Alexandra [31]

1) Displacement: -49 m, in the negative direction

Explanation:

The displacement of an object is a vector, whose magnitude is given by the difference between the final point of the motion and the starting point:

$d=p_f -p_i$

In this problem, the starting point is +34 m, while the final position is -15 m; therefore, the displacement is:

$d=-15 m- (+34 m)=-49 m$

and the direction is negative, in according to the negative sign.

2) Velocity: -3.27 m/s

Explanation:

Velocity is equal to the ratio between the displacement and the time taken:

$v=\frac{d}{t}$

in this problem, we have:

d = -49 m is the displacement

t = 15 s is the time

therefore, the velocity is

$v=\frac{-49 m}{15 s}=-3.27 m/s$

and the direction is negative.

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3 years ago