3 years ago

Why does a box on the seat of a car slide around on the c one the car speeds up slows down or turns a corner?

1 answer:

8 0

Because the box keeps going straight at the same speed, while the seat under it speeds up, slows down, or changes direction.

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Bethany feels as though she cannot enjoy flowers properly, as she has lost her sense of smell. Bethany has _______

Zolol [24]

Answer: Anthophobia

Explanation: A fear of flowers

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3 years ago

A lamp hangs vertically from a cord in a descending elevator that decelerates at 1.4 m/s2. (a) If the tension in the cord is 91

yanalaym [24]

Answer:8.125 kg

Explanation:

Given

deceleration of elevator $a=1.4\ m/s^2$

suppose T is the tension in the cord

therefore net force on lamp is

$F_{net}=T-mg$

$F_{net}=ma$

direction of a and g is in the same direction

$T-mg=m(1.4)$

$T=m(g+a)$

$m=\dfrac{T}{g+a}$

$m=\dfrac{91}{9.8+1.4}$

$m=8.125\ kg$

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3 years ago

You are 15.0m from the source of a sound. At that distance, you hear it at a sound level of 20.0dB. How close must you move to t

Andrej [43]

The answer is 45.0cm

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3 years ago

Read 2 more answers

You push against a wall and the wall pushes back on you.

emmainna [20.7K]

Answer:

Its the third law of motion.

Explanation:

Newton's third law of motion states that every action has equal and opposite reaction.

4 0

3 years ago

A 85-kg astronaut is stranded from his space shuttle. He throws a 1-kg hammer away from the shuttle with a velocity of 17 m/s. H

algol [13]

Answer:

0.2 m/s

Explanation:

given,

mass of astronaut, M = 85 Kg

mass of hammer, m = 1 Kg

velocity of hammer , v =17 m/s

speed of astronaut, v' = ?

initial speed of the astronaut and the hammer be equal to zero = ?

Using conservation of momentum

(M + m) V = M v' + m v

(M + m) x 0 = 85 x v' + 1 x 17

85 v' = -17

v' = -0.2 m/s

negative sign represent the astronaut is moving in opposite direction of hammer.

Hence, the speed of the astronaut is equal to 0.2 m/s

4 0

3 years ago