Mecanica BAC

Mecanica BAC

9th - 12th Grade

28 Qs

quiz-placeholder

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Mecanica BAC

Mecanica BAC

Assessment

Quiz

Physics

9th - 12th Grade

Practice Problem

Hard

Created by

Bianca Necula

Used 7+ times

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28 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Legea spatiului pentru miscarea rectiline uniform variata este:

x = x0 + v0t +a2Δt2x\ =\ x_{0\ }+\ v_0t\ +\frac{a}{2}\Delta t^2

v = v0+aΔtv\ =\ v_0+a\Delta t

v2= v02 + 2aΔxv^2=\ v_0^2\ +\ 2a\Delta x

x = x0 + vΔtx\ =\ x_0\ +\ v\Delta t

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Care NU este o forta?

Forta arhimedica

Greutatea

Forta de frecare

Presiunea

Tensiunea in fir

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Valoarea acceleratiei este negativa atunci cand:

corpul incetineste

corpul accelereaza

corpul incepe sa se deplaseze in sens opus

corpul ramane in repaus

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Un corp este aruncat pe verticala de jos in sus. Inaltimea maxima la care ajunge are formula:

v0g\frac{v_0}{g}

12gv02x2\frac{1}{2}\cdot\frac{g}{v_0^2}\cdot x^2

v022gsin2α\frac{v_0^2}{2g}\sin^2\alpha

v022g\frac{v_0^2}{2g}

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Pe un plan inclinat greutatea tangentiala are formula:

mgcosαmg\cos\alpha

mgsinαmg\sin\alpha

mgmg

mgtanαmg\tan\alpha

6.

MULTIPLE SELECT QUESTION

1 min • 1 pt

Formula puterii mecanice:

Lt\frac{L}{t}

mv22\frac{mv^2}{2}

11+ctgαμ\frac{1}{1+\operatorname{ctg}\alpha\cdot\mu}

FmvF_m\cdot v

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Randamentul planului inclinat este mereu negativ.

Adevarat

Fals

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