Ask question

Ask question

All categories

3 years ago

8

Two cars have collided head on. one car was traveling at a speed of 55 mph and the other at 35 mph the total speed of impact wou

ld be

1 answer:

MaRussiya [10]3 years ago

5 0

I believe total speed of impact is the sum of the two speeds = 55 mph + 35 mph = 90 mph

You might be interested in

What is the relationship between force, velocity, and mass?

marysya [2.9K]

Answer:

The slower the intended velocity, the closer the force expressed comes to equalling the linear inertia of the load (i.e. the amount of force needed to hold the weight motionless). From Equation 1, force is inversely proportional to time

3 0

2 years ago

Read 2 more answers

Pulmonary circulation involves blood flow to and from the heart and the ____?

olga nikolaevna [1]

I believe the answer would be lungs

3 0

3 years ago

Read 2 more answers

A wheel turns through 5.5 revolutions while being accelerated from rest at 20rpm/s.(a) What is the final angular speed ? (b) How

alina1380 [7]

Answer:

(a) The final angular speed is 12.05 rad/s

(b) The time taken to turn 5.5 revolutions is 5.74 s

Explanation:

Given;

number of revolutions, θ = 5.5 revolutions

acceleration of the wheel, α = 20 rpm/s

number of revolutions in radian is given as;

θ = 5.5 x 2π = 34.562 rad

angular acceleration in rad/s² is given as;

$\alpha = \frac{20 \ rev}{min} *\frac{1}{s} *(\frac{2\pi \ rad}{1 \ rev } *\frac{1 \ min}{60 \ s}) \\\\\alpha = 2.1 \ rad/s^2$

(a)

The final angular speed is given as;

$\omega _f^2 = \omega_i ^2 + 2\alpha \theta\\\\\omega _f^2 = 0 + 2\alpha \theta\\\\\omega _f^2 = 2\alpha \theta\\\\\omega _f = \sqrt{2\alpha \theta}\\\\ \omega _f = \sqrt{2(2.1) (34.562)}\\\\ \omega _f = 12.05 \ rad/s$

(b) the time taken to turn 5.5 revolutions is given as

$\omega _f = \omega _i + \alpha t\\\\12.05 = 0 + 2.1t\\\\t = \frac{12.05}{2.1} \\\\t = 5.74 \ s$

3 0

2 years ago

Ferns that eject spores generally do so in pairs, with two spores flying off in opposite directions. The structure from which th

Furkat [3]

Answer:

It cancels recoil.

Explanation:

For each action there is an equal an opposite reaction.

The principle of conservation of momentum tell us that if a single spore were ejected the fern would suffer a recoil from it. This recoil would take energy and speed from the spore. But if they are ejected in pairs the recoil is canceled and all the energy is transferred to the spores resulting in higher speeds.

5 0

3 years ago

DO NOT ANSWER IF YOU DON'T KNOW

Andrew [12]

The last one, the soil will become weak & unable to support plant growth

4 0

3 years ago