Question

1/ An object moving at a certain speed has a kinetic energy KE of 90 J....

1/ An object moving at a certain speed has a kinetic energy KE of 90 J. If its speed is made 3 times smaller, what would the decrease in its KE be? 2/ An object of mass 1 kg is pushed up along a 5 m long incline to a vertical height of 1 m. The change in its potential energy is;
3/ A 1-kg object is dropped from a height of 40 m and falls freely to the ground. When the object is halfway down, its kinetic energy is; (g=10m/s2)
Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

if you have any dout in my solution then plz comment me otherwise like it Thank you

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
An object has a kinetic energy of 254 J and a momentum of magnitude 24.8 kg...
An object has a kinetic energy of 254 J and a momentum of magnitude 24.8 kg · m/s. (a) Find the speed of the object.  m/s (b) Find the mass of the object. kg
A small object with a mass of 1.62 kg is moving with a speed of 290...
A small object with a mass of 1.62 kg is moving with a speed of 290 m/s (with respect to the ground) when it collides with a rod with a mass of 11.99 kg and a length of L m. The rod is initially at rest, in a vertical position, and pivots about an axis going through its center of mass which is located exactly halfway along the rod. The object imbeds itself in the rod at a distance L/4...
1) The position of an object moving along the x-axis is given by x(t) = 2t^2...
1) The position of an object moving along the x-axis is given by x(t) = 2t^2 - 21t^2 + 100t. At what time is the object moving the slowest? 2) A water balloon is thrown upward from a window 25 m above the ground and hits the ground 3.30 s later. What’s the maximum height above the window that the balloon reaches? 3) A boy throws a rock with an initial velocity of 5.15 m/s at an angle 30° above...
1) If a person holds 50 kg object at a height of 2 m above the...
1) If a person holds 50 kg object at a height of 2 m above the floor for 10 s. How much work is done? W = F×d (2) The work done in lifting 30kg of bricks to a height of 20m is W = m ×g × d (Formula, W = F × d but Force = m × g) (3) A total of 4900 J is used to lift a 50-kg mass. The mass is raised to a...
1. Which has the greater kinetic energy, a heavy truck at rest or a moving roller...
1. Which has the greater kinetic energy, a heavy truck at rest or a moving roller skate? a. none of above b. heavy truck at rest c. the roller skate at rest d. The kinetic energies are equal. 2. If a sports car with a mass of 2000 kg travels down the road with a speed of 10 m/s, its kinetic energy is _______________ kg (m/s)2 a. 80000 b. 16000 c. 8000 d. 100000 e.none of above 3. A sports...
1. An object in motion is said to have kinetic energy. Kinetic energy is determined by...
1. An object in motion is said to have kinetic energy. Kinetic energy is determined by the velocity and mass of the object in motion. If m and v are the mass and velocity of the object: ??????? ?????? = (1/2 *? )∗ (v^2) Write a Python function that calculates and returns the kinetic energy given m and v. Ask the user to input the mass and velocity of a moving object. Using the python function that you wrote calculate...
1. The concept of work is equivalent to a transfer of energy. True False 2. Work...
1. The concept of work is equivalent to a transfer of energy. True False 2. Work is required to transfer energy from one form to another, for example, to convert kinetic energy into potential energy. True False 3. An object with mass of 1000 kg is moving at a rate of 20 m/s. Its kinetic energy is a. 0 J b. 20,000 J c. 200,000 J d. 400,000 J 4. A car speeds up from 10 m/s to 15 m/s....
1) Consider an object of mass m1 = 0.425 kg moving with a uniform speed of...
1) Consider an object of mass m1 = 0.425 kg moving with a uniform speed of 6.65 m/s on a frictionless surface. This object makes an elastic head-on collision with another object of mass m2 = 0.555 kg  which is initially at rest. (a) Find the speed of m1 immediately after collision. (b) Find the speed of m2 immediately after collision. 2) An object of mass m1 = 0.395 kg  starts from rest at point  and slides down an incline surface that makes...
A 10 kg box slides down a long, frictionless incline of angle 30°. It starts from...
A 10 kg box slides down a long, frictionless incline of angle 30°. It starts from rest at time t = 0 at the top of the incline at a height of 18 m above ground. (a) What is the original potential energy of the box relative to the ground? ---J (b) From Newton's laws, find the distance the box travels in 1 s and its speed at t = 1 s. ---m ---m/s (c) Find the potential energy and...
A 9.00 kg object is moving to the left with a speed 9.00 m/s. Another 9.00...
A 9.00 kg object is moving to the left with a speed 9.00 m/s. Another 9.00 object is moving to the right with a speed of 9.00 m/s. The two objects collide and stick together. The magnitude of the loss in the kinetic energy because of the collision, in Joules, is:
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT