# TNT

Popular questions and responses by TNT
1. ## physics

The position of a particle moving along the x axis is given by x = (21 + 22t − 6t^2)m, where t is in s. What is the average velocity during the time interval t = 1s to t = 3s?

2. ## physics

The position of an object as a function of time is given as x = At3 + Bt2 + Ct + D. The constants are A = 2.3m/s3, B = 1.8m/s2, C = −4.3m/s, and D = 2 m.(a) What is the velocity of the object at t = 12s? (b) What is the acceleration of the object at t =

3. ## physics

A race car moving with a constant speed of 60 m/s completes one lap around a circular track in 50 s. What is the magnitude of the acceleration of the race car?

4. ## physics

A rock is thrown downward from an unknown height above the ground with an initial speed of 10m/s. It strikes the ground 3s later. Determine the initial height of the rock above the ground.

5. ## physics

A ball thrown vertically from ground level is caught 3s later when it is at its highest point by a person on a balcony which is 14 m above the ground. Determine the initial speed of the ball

6. ## physics

An Earth satellite moves in a circular orbit 616 km above the Earth's surface. The period of the motion is 96.8min. (a) What is the speed of the satellite? (b) What is the magnitude of the centripetal acceleration of the satellite

7. ## physics

In the figure below, a stone is projected at a cliff of height h with an initial speed of 44m/s directed 60° above the horizontal. The stone strikes at A, 5.8s after launching. (a) Find the height, h, of the cliff. (b) Find the speed of the stone just

8. ## physics

A brick is thrown upward from the top of a building at an angle of 35° to the horizontal and with an initial speed of 14 m/s. If the brick is in flight for 3s, how tall is the building?

9. ## physics

Let = 2 î + 3 ĵ and = 2 î - 2 ĵ. Find the magnitude of the following. (a) and (b) + (c) - - 2

10. ## physics

A ball spins on a 0.5m-long string with a speed of 3.8m/s. Calculate the acceleration of the ball.

11. ## physics

A ball is thrown directly downward, with an initial speed of 11m/s, from a height of 56m. After what time interval does the ball strike the ground?

12. ## physics

An airplane starts from rest and accelerates at 11.5m/s^2. What is its speed at the end of a 655m runway?

13. ## physics

A ball is tossed vertically upward with an initial speed of 18.2 m/s. How long does it take before the ball is back on the ground? (Assume the ball is tossed upward from the ground.)

14. ## physics

The velocity as a function of time for a car on an amusement park ride is given as v = At2 + Bt with constants A = 2.9m/s3 and B = 1.3m/s2. If the car starts at the origin, what is its position at t = 4.2s?

15. ## physics

The position of a particle moving along the x-axis is given by x = (13 + 11t − 1.5t2), where t is in seconds and x is in meters. What is the average velocity during the time interval from t = 1s to t = 4 s?

16. ## History

Hey I need help finding why "Capitalism has produced great wealth and inequalities in today's world." http://www.google.com/search?q=capitalism&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA There are several good articles

1. ## physics

Henry do I use the same equation to solve for #2 too or it is just for #1?

posted on February 18, 2018
2. ## physics

how do I solve for these two physics questions #1on the top and #2 on the bottom

posted on February 17, 2018
3. ## physics

A race car moving with a constant speed of 60 m/s completes one lap around a circular track in 50 s. What is the magnitude of the acceleration of the race car?

posted on February 17, 2018
4. ## physics

very helpful information. I need a teacher like you.

posted on February 16, 2018
5. ## physics

Let = 2 î + 3 ĵ and = 2 î - 2 ĵ. Find the magnitude of the following. (a) Eand F (b) E+F (c) -E – 2F

posted on February 16, 2018
6. ## physics

Sorry , I'm new user to jiskha

posted on February 16, 2018
7. ## physics

An airplane starts from rest and accelerates at 11.5m/s2. What is its speed at the end of a 655m runway?

posted on February 16, 2018