Question

A model rocket with a mass of 0.181 kg is launched into the air with an...

A model rocket with a mass of 0.181 kg is launched into the air with an initial speed of 92 m/s. How much kinetic energy will the rocket have at a height of 164 m? Assume there is no wind resistance.

a.) 747J

b.) 303J

c.) 444J

d.) 634J

A car of mass 1290 kg is traveling along a horizontal road. During a span of 8.9 seconds, the car accelerates from 10.0 m/s to 16.5 m/s. How much work does the car's engine perform on the car during this time?

a.) 791 kj

b.) 111 kj

c.) 692 kj

d.) 340 kj

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A rocket with mass m=5kg is launched into the air. the rocket engine 25,000j of work...
A rocket with mass m=5kg is launched into the air. the rocket engine 25,000j of work before it stops burning and the rocket reaches a mac height h=180 m what is the speed of the rocket when it reaches its max height . B what is the rocket speed when it hits the ground again c what maximum height would the rocket reach if it had been launched straight up
The rocket is launched at 36° with the ground (stage A), from rest towards the East....
The rocket is launched at 36° with the ground (stage A), from rest towards the East. The rocket engine provides a constant net acceleration of 4.1 ms-2 and burns for 8.6 s (stage B). During this stage (i.e. AB) the rocket travels in a straight-line. At the end of stage B the engine shuts off and rocket starts moving as a typical projectile. After reaching its maximum height (stage C), it drops for 82 m and then a parachute opens...
A rocket has total mass ??I= 4 × 105 kg at the time of ignition; 95%...
A rocket has total mass ??I= 4 × 105 kg at the time of ignition; 95% of this mass is fuel. After ignition, gas is ejected at a constant rate of 1200 kg/s with an ejection speed of 3 × 103 m/s. The rocket is launched vertically from the surface of the earth. Ignore air drag and assume gravity is constant when answering the following. a) (2 points) How long after ignition does the rocket lift off and how much...
Consider a rocket launched from a platform at sea level on Earth, in the vertical direction....
Consider a rocket launched from a platform at sea level on Earth, in the vertical direction. Atmospheric drag can be ignored, but gravity is to be taken into account (can be assumed constant). The dry mass is 1000 kg, and the total propellant mass is 4000 kg. The specific impulse is equal to 300 s, and the propellant flow is equal to 50 kg/s (can be assumed constant). What is the acceleration of the vehicle at liftoff, and what is...
Robert has just bought a new model rocket, and is trying to measure its flight characteristics....
Robert has just bought a new model rocket, and is trying to measure its flight characteristics. The rocket engine package claims that it will maintain a constant thrust of 12.3 N until the engine is used up. Robert launches the rocket on a windless day, so that it travels straight up, and uses his laser range-finder to meaure that the height of the rocket when the engine cuts off is 10.2 m. He also measures the rocket\'s peak height, which...
A 2400-kg test rocket is launched vertically from the launch pad. Its fuel (of negligible mass)...
A 2400-kg test rocket is launched vertically from the launch pad. Its fuel (of negligible mass) provides a thrust force so that its vertical velocity as a function of time is given by v(t)=At+Bt2, where A and B are constants and time is measured from the instant the fuel is ignited. At the instant of ignition, the rocket has an upward acceleration of 1.90 m/s2 and 1.20 s later an upward velocity of 1.50 m/s . Part A) Determine A....
A rocket car with a mass of 1500kg when empty is loaded with 90kg of fuel...
A rocket car with a mass of 1500kg when empty is loaded with 90kg of fuel which is consumed at a rate of 10 kg/s and is ejected from the back of the car with a relative velocity of 500 m/s. The drag force is if Fd = 6.8v where v is the velocity in m/s. What is the maximum velocity obtained by the car? After the car runs out of fuel, how much farther does it travel?
For his engineering project, Fran¸cois built a model rocket of mass m = 0.55 kg simply...
For his engineering project, Fran¸cois built a model rocket of mass m = 0.55 kg simply by using materials he found lying around the lab and blueprints he found on the internet. The rocket’s propulsion is provided by a special battery-powered fan that is able to provide a constant force |Ffan| = 7.0 N – that is, once it is launched in a specific direction, the direction of the fan’s force does not change. The downside is that the rocket...
The space shuttle, with an initial mass M = 2.41×106 kg, is launched from the surface...
The space shuttle, with an initial mass M = 2.41×106 kg, is launched from the surface of the earth with an initial net acceleration a = 26.1 m/s^2. The rate of fuel consumption is R = 6.90×103 kg/s. The shuttle reaches outer space with a velocity of vo = 4632. m/s, and a mass of Mo = 1.45×106 kg. How much fuel must be burned after this time to reach a velocity vf = 5495. m/s? *Possible to solve without...
A radio controlled model car with mass m=2.98 kg starts a race initially from rest at...
A radio controlled model car with mass m=2.98 kg starts a race initially from rest at t=0 and accelerates with constant acceleration to a speed of 14.4 m/s in a time of t=10.0 s. What is the average power do the car's batteries have to deliver during the acceleration, and what is the instantaneous power at the end of the time interval? Select one answer for average power (P-ave) and one for the instantaneous power at t=10.0 s (P-final). P-ave=31...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT