11TH GRADE PRACTICE

Physics Problems: Special relativity, Grade 11

Relativistic mass, time and length.

5 problems1 subtopics

Solve interactively

CONDITIONS

Problems

№ 54

Problem 54

Fundamentals of Special Relativity

How far will light travel in an hour? What is the physical meaning of the speed of light?

$5{,}4 \cdot 10^{11}\,\text{m}$
$2{,}16 \cdot 10^{12}\,\text{m}$
$1{,}08 \cdot 10^{13}\,\text{m}$
$1{,}08 \cdot 10^{12}\,\text{m}$

№ 57

Problem 57

Fundamentals of Special Relativity

At what speed will relativistic time in a moving system slow down by $2$ times?

$5{,}2 \cdot 10^{8}\,\text{m/s}$
$2{,}6 \cdot 10^{9}\,\text{m/s}$
$2{,}6 \cdot 10^{8}\,\text{m/s}$
$1{,}3 \cdot 10^{8}\,\text{m/s}$

№ 58

Problem 58

Fundamentals of Special Relativity

Bullet mass $100\,\text{g}$ . How much will its mass increase during the combustion of gunpowder with a specific energy of $10^{7}\,\text{J/kg}$ , if all the energy is transferred to the bullet?

$5{,}5 \cdot 10^{-12}\,\text{kg}$
$2{,}2 \cdot 10^{-11}\,\text{kg}$
$1{,}1 \cdot 10^{-10}\,\text{kg}$
$1{,}1 \cdot 10^{-11}\,\text{kg}$

№ 59

Problem 59

Fundamentals of Special Relativity

The first satellite had a mass of $80\,\text{kg}$ and flew at a speed of $8\,\text{km/s}$ . By how much did its relativistic mass increase?

$0{,}00284\,\text{kg}$
$0{,}00142\,\text{kg}$
$0{,}00568\,\text{kg}$
$0{,}0284\,\text{kg}$

№ 60

Problem 60

Fundamentals of Special Relativity

What potential difference must an electron pass through for its relativistic mass to increase $4$ times?

$1{,}53 \cdot 10^{7}\,\text{V}$
$1{,}53 \cdot 10^{6}\,\text{V}$
$7{,}65 \cdot 10^{5}\,\text{V}$
$3{,}06 \cdot 10^{6}\,\text{V}$

THEORY

Lessons on the topic

Relativistic effectsChanges in mass, time and length at high speeds.