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3 years ago

A simple way to state Newtons first law is:

Physics

1 answer:

Sliva [168]3 years ago

6 0

Answer:

A simple way to state Newtons first law is:

For every action force, there is a reaction force which is equal in magnitude and opposite in direction.

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A ball is thrown with a velocity of 40 m/s at an angle of 30° above the horizontal and attains a certain range R. At what other

choli [55]

Answer:

This ball will attain the same range at 60°.

Explanation:

Projectile motion: when an object is thrown in such a way that it form an angle with horizon, the force act on it that is the acceleration due gravity. This type of motion is known as projectile motion.

Range: The horizontal distance is covered by an object.

Range $=\frac{u^2 sin2\theta}{g}$

u = initial velocity = 40 m/s

θ = 30°

g = gravity =9.8 m/s²

$Range=\frac{40^2\times sin(2\times 30^\circ)}{9.8}$

$=\frac{800\sqrt{3} }{9.8}$

Next,

Range $=\frac{800\sqrt{3} }{9.8}$ and u = 40 m/s

$sin2\theta =\frac{Range \times g}{u^2}$

$\Rightarrow sin2\theta =\frac{\frac{800\sqrt{3} }{9.8} \times 9.8}{40^2}$

$\Rightarrow sin 2\theta =\frac{\sqrt{3} }{2}$

$\Rightarrow sin 2\theta = sin 120^\circ$

$\Rightarrow \theta =120^\circ$

$\Rightarrow \theta =60^\circ$

This ball will attain the same range at 60°.

3 0

3 years ago

How do the units that are used to measure heat differ from the units that are used to measure temperature?

irakobra [83]

Heat is measured in joules and temperature is measured in F degrees or C degrees.

6 0

4 years ago

Kepler's second law states that

mafiozo [28]

Awnser A. The orbits of the planets are

7 0

3 years ago

A mole of gas at 0.0oC and 760. torr occupies 22.4 L. What is the volume of this gas at 25.oC and 760. torr

daser333 [38]

Answer:

Explanation:

Given

Temperature of gas at First stage $T_1=0^{\circ}C\approx 273\ K$

Pressure of gas at First stage $P_1=760\ torr$

Volume Occupies $V_1=22.4\ L$

If the Pressure and Temperature at second stage is

$P_2=760\ torr$

$T_2=25^{\circ}C\approx 298\ K$

Using ideal gas Equation

$PV=nRT$

where P=Pressure

V=volume

R=Universal Gas constant

T=Temperature

n=no of moles

as n and R is constant therefore

$\frac{PV}{T}=constant$

thus $\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

$V_2=\frac{760}{760}\times \frac{298}{273}\times 22.4$

$V_2=24.45\ L$

8 0

3 years ago

An object with a mass of 1500 g (grams) accelerates 10.0 m/s2 when an

masya89 [10]

Answer:

15N

Explanation:

F=ma

m=1500g = 1.5kg

a=10m/s2

1.5×10=15 N

8 0

3 years ago

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