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3 years ago

Which of these terms means an object's resistance to changing its motion?

Physics

1 answer:

Mila [183]3 years ago

8 0

Answer:

Inertia

F=ma

Action, reaction

All of the above

A heavy object requires more force to push than a lighter object.

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The horizontal surface on which the 2.0 - kg block slides is frictionless. The speed of the block before it touches the spring i

vlabodo [156]

Answer:

0.918 seconds

Explanation:

M = 2kg

V = 9.0 m/s

g = 9.8 m/s

F = Mg cosΘ

Θ = 0°

But F = Ma

a = v / t

F = m*v / t

Mv / t = mg cos0

V / t = g

t = v / g

t = 9.0 / 9.8

t = 0.918s

5 0

3 years ago

A 3.70 kg block moving 2.09 m/s right hits a 2.42 kg block moving 3.92 m/s left. Find the total momentum of the system.

Novosadov [1.4K]

Answer:

-1.7534 Kg.m/s

Explanation:

Momentum, p is a product of mass and velocity, expressed as p= mv where m is the mass and v is the velocity which is dependent on the direction. Taking left as negative and right as positive then the initial momentum will be

p=-2.42*3.92+(3.7*2.09)=-1.7534 Kg.m/s

5 0

3 years ago

In the context of depth perception, which of the following is a monocular cue?

olga55 [171]

Hello there.

<span>In the context of depth perception, which of the following is a monocular cue?

</span><span>(C) Convergence
</span>

8 0

3 years ago

What is the gravitational potential energy of a 0.550-kg projectile flying with 335 m/s, 72 meters above the ground?

Fofino [41]

Answer:

GPE = 388.08 Joules.

Explanation:

Given the following data;

Mass = 0.550kg

Speed = 335 m/s

Height = 72 meters

We know that acceleration due to gravity, g is equal to 9.8 m/s²

To find the gravitational potential energy;

Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.

Mathematically, gravitational potential energy is given by the formula;

$G.P.E = mgh$

Where;

G.P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Substituting into the formula, we have;

$G.P.E = 0.550 * 9.8 * 72$

GPE = 388.08 Joules.

4 0

3 years ago

A photographer uses his camera, whose lens has a 50 mm focal length, to focus on an object 1.5 m away. He then wants to take a p

allsm [11]

Answer:

The distance is $z = 0.008 \ m$

Explanation:

From the question we are told that

The focal length is $f = 50 \ mm = 50*10^{-3} \ m$

Generally the lens equation is mathematically represented as

$\frac{1}{u} + \frac{1}{v} = \frac{1}{f}$

At image distance u = 1.5 m

$\frac{1}{1.5} + \frac{1}{v} = \frac{1}{50 *10^{-3}}$

=> $\frac{1}{50 *10^{-3}} - \frac{1}{1.5} = \frac{1}{v}$

=> $v = 0.052 \ m$

At image distance $u = 30\ cm = 0.30 \ m$

$\frac{1}{0.3} + \frac{1}{v_1} = \frac{1}{50 *10^{-3}}$

=> $\frac{1}{50 *10^{-3}} - \frac{1}{0.30 } = \frac{1}{v_1}$

=> $v_1 = 0.06 \ m$

The distance the lens need to move is evaluate as

$z = |v - v_1|$

$z = |0.052 - 0.06|$

$z = 0.009 \ m$

8 0

3 years ago