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3 years ago

PLEASE ANSWER 50 points

Physics

1 answer:

Evgen [1.6K]3 years ago

6 0

Increase the force the engine provides and decrease the mass of the car

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During which type of collision do the two objects stick together?

inysia [295]

Answer:

D. Perfectly inelastic

Explanation:

Kinetic energy is lost so the two bodies stick together.

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3 years ago

A ________________ in a transverse wave corresponds to a compression in a longitudinal wave

cluponka [151]

The answer is Crest in transverse waves, this is where the particles are closest to each other due to the compression of the longitudinal component of the wave.

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3 years ago

The length of a bicycle pedal arm is 0.177 m, and a downward force of 145 N is applied to the pedal by the rider. What is the ma

kramer

Answer:

(a) 19.25 N-m

(b) 25.67 N-m

(c) 0 N-m

Explanation:

Given:

Length of the pedal arm (L) = 0.177 m

Downward force $(|\vec{F}|)$ = 145 N

Magnitude of torque is given by the formula:

$T=FL\sin\theta$

Where, $\theta\to angle\ between\ F\ and\ L$

(a)

Given:

$\theta=48.6$ °

Therefore, torque is given as:

$T=FL\sin\theta\\\\T=(145\ N)(0.177\ m)(\sin(48.6))\\\\T=19.25\ Nm$

Therefore, the torque is 19.25 N-m.

(b)

Given:

$\theta=90$ °

Therefore, torque is given as:

$T=FL\sin\theta\\\\T=(145\ N)(0.177\ m)(\sin(90))\\\\T=25.67\ Nm$

Therefore, the torque is 25.67 N-m.

(c)

Given:

$\theta=180$ °

Therefore, torque is given as:

$T=FL\sin\theta\\\\T=(145\ N)(0.177\ m)(\sin(180))\\\\T=0\ Nm$

Therefore, the torque is 0 N-m.

8 0

3 years ago

Object A and object B are moving with the same momentum. Which of the following statements must be true?

nordsb [41]

The FIRST statement on the list is the definition of momentum, so that's the one that must be true.

5 0

3 years ago

You normally drive on the freeway between San Diego and Los Angeles at an average speed of 105 km/h (65 mi/h), and the trip take

valkas [14]

Answer: 2 hr 45 min

Explanation:

Given

The average speed between San Diego and Los Angeles is $105\ kmph$

time taken for this trip is $1\ hr\ 50\ min\ or\ \frac{11}{6}\ hr$

Distance between San Diego and Los Angeles is

$\Rightarrow d=105\times \dfrac{11}{6}\\\\\Rightarrow d=192.5\ km$

For Friday afternoon, the average speed is $70\ km/h$

time taken to complete the trip is

$\Rightarrow t=\dfrac{192.5}{70}\\\\\Rightarrow t=2.75\ hr\ or\ 2\ hr\ 45\ min$

3 0

3 years ago