Physics: 80123.00 in scientific notation then rounded up to 3 sig figs

80123.00 in scientific notation then rounded - id80123002562763, smandylee123

paolaz80045

29.12.2022

$T =7.7 \ s$

$s = 73.3 \ m$

Explanation:

From the question we are told that

The speed is $u = 45.2 \ m/s$

The angle is $\theta = 57 .0^o$

Generally the velocity of the stone in the y-axis is mathematically evaluated as

$v_y = v * sin(\theta )$

=> v_y = 45.2 * sin(57 )

=> $v_y = 37.9 \ m/s$

Now the time taken for the first flight is mathematically represented as

$t = \frac{v_y}{g}$

=> $t = \frac{37.9}{9.8}$

=> $t = 3.87 \ s$

The time taken for the total flight is mathematically represented as

T = 2 * t

T = 2 * 3.87

$T =7.7 \ s$

From the equation of kinematics we have that

v^2 = v_y^2 + 2gs

At maximum heigth v = 0

= 37.9 ^2 + 2 *( -9.8) * s The negative sign is because it is moving against gravity to attain the maximum height

$s = 73.3 \ m$

0,0(0 оценок)