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3 years ago

PLEASE HELP WILL GIVE BRAINLIEST!!!!!!!!!

2 answers:

Natasha2012 [34]3 years ago

7 0

Your answer is 98 N (g = -9.8 m/s^2) Disregard the negative sign so you get 9.8 remove the decimal and your answer is 98 N.

(I took the test 98 N is correct)

jonny [76]3 years ago

5 0

98 N is the answer. It is as 10 kg

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A car accelerates from rest at 2 m/s. what is the speed after 8 sec?

beks73 [17]

Answer:

16m/s

Explanation:

$v_{f}=v_{i}+at$

$v_{f}=0+2\cdot8$

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Therefore, the speed after 8 seconds is 16m/s

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2 years ago

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Pavlova-9 [17]

Answer:

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1 year ago

A ski lift carries a 75.0-kg skier at 3.00 m/s for 1.50 min along a cable that is inclined at an angle of 40.0° above the horizo

Nookie1986 [14]

Answer

given,

mass of the ski = 75 Kg

speed of the skier, v = 3 m/s

time = 1.50 min = 90 s

angle of inclination, θ = 40°

distance = s x t

= 3 x 90 = 270 m

a) W = F. d cos θ

W = mg. d cos θ

W = 75 x 9.8 x 270 x cos 40°

W = 152021.52 J

work is done by the ski lift is equal to 152021.52 J

b) Power extended by the ski

$Power = \dfrac{Work\ done}{time}$

$Power = \dfrac{152021.52}{90}$

P = 1689.13 Watt.

power is expended by the ski lift is equal to 1689.13 W.

3 0

2 years ago

If the lily pads are spaced 2.4 m apart and Ferdinand jumps with a speed of 5 m/s taking 0.6 s to go from lily pad to lily pad,

Zina [86]

Answer:

$36.87^{\circ}$

Explanation:

v = Velocity of Ferdinand = 5 m/s

$\theta$ = Angle of jump

T = Time taken = 0.6 s

R = Distance between lily pads = 2.4 m

Horizontal range is given by

$R=v_xT\\\Rightarrow R=vcos\theta T\\\Rightarrow cos\theta=\dfrac{R}{vT}\\\Rightarrow \theta=cos^{-1}\dfrac{R}{vT}\\\Rightarrow \theta=cos^{-1}\dfrac{2.4}{5\times 0.6}\\\Rightarrow \theta=36.87^{\circ}$