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4 years ago

By how much will the velocity of a vehicle change if it accelerates at 10 m/s/s for a period of 10 seconds

Physics

1 answer:

pishuonlain [190]4 years ago

7 0

Answer:

Explanation:

we know that the time rate of change of velocity is called acceleration mathmetically;

a=Δv/Δt

Δv=a*Δt

a=10 m/s²

t=10 sec

Δv=10*10=100 m/s

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A tugboat pulls a ship with a constant net horizontal force of 5.00 × 103 N and causes the ship to move through a harbor. How mu

Mazyrski [523]

Answer:

15 MW

Explanation:

Work done is a product of force and distance moved.

W=fd where f represnt force while d is distance

Substituting f with 5 kN and 3 000 for d then

W= 5*3000=15000 kW which is equivalent to 15 MW

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4 years ago

Assuming there are no accidents or delays, the distance that a car travels down the interstate

Ganezh [65]

Explanation:

The distance that a car travels down the interstate can be calculated with the following formula:

Distance = Speed x Time

(A) Speed of the car, v = 70 miles per hour = 31.29 m/s

Time, d = 6 hours = 21600 s

Distance = Speed x Time

D = 31.29 m/s × 21600 s

D = 675864 meters

$D=6.75\times 10^5\ m$

(b) Time, d = 10 hours = 36000 s

Distance = Speed x Time

D = 31.29 m/s × 36000 s

D = 1126440 meters

$D=1.12\times 10^6\ m$

(c) Time, d = 15 hours = 54000 s

Distance = Speed x Time

D = 31.29 m/s × 54000 s

D = 1689660 meters

$D=1.68\times 10^6\ m$

Hence, this is the required solution.

7 0

3 years ago

6. A water brake copupled to an engine on test absorbs 70 kW of power. Find the heat generated at the brake per minute and the m

PtichkaEL [24]

Answer:

4200 kJ

10 kg/min

Explanation:

70 kW means 70 kJ per second. So in a minute, the amount of heat generated at the brake is:

70 kJ/s × 60 s/min = 4200 kJ

Heat = mass × specific heat capacity × increase in temperature

4200 kJ = m × 4.184 kJ/kg/C × 100 C

m = 10 kg

So every minute, 10 kg of water is heated. So the mass flow is 10 kg/min.

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3 years ago

When someone throws a ball the action force is the person pushing on the ball. What is the reaction force?

vekshin1

The air resistance and gravity pulling it down

5 0

3 years ago

Read 2 more answers

A 3.7kg block on a horizontal frictionless surface is attached to a spring whose force constant is 450 N/m. The block is pulled

earnstyle [38]

Answer:

U=1.44 J

Explanation:

Given that

m = 3.7 kg

K = 450 N/m

X= 0.08 m

We know that spring stored potential energy(U) and this potential energy given as

$U=\dfrac{1}{2}KX^2$

By putting the values

$U=\dfrac{1}{2}KX^2$

$U=\dfrac{1}{2}\times 450\times 0.08^2$

U=1.44 J

5 0

3 years ago

By how much will the velocity of a vehicle change if it accelerates at 10 m/s/s for a period of 10 seconds​

By how much will the velocity of a vehicle change if it accelerates at 10 m/s/s for a period of 10 seconds