Physics, 31.03.2020 18:32 brooklyn4682

1)Developing
Write Newton’s 2nd Law, using algebra, manipulate the equation to get the impulse/momentum equation.

2)An egg dropped on concrete will break when dropped from a short height while a second egg dropped from a greater distance will be safe it lands on a pillow. Explain why.

3)List three safety devices on a car and explain why they are effective using the impulse/momentum equation.

4)A 1000 kg car accelerates from 10 mph to 50 mph. By what factor does the momentum change?

5)Proficient
A bat exerts a 120 N force on a 0.134 kg baseball for 0.04 seconds. What impulse is exerted on the bat?

6)The second stage of a 100 kg rocket accelerates the rocket from 100 m/s to 480 m/s in 4 seconds. What is the change in momentum of the rocket? (Assume no loss of mass from burning fuel).

7)A 1400 kg car is pushed with a force of 100 N for 8 seconds. What is the change in velocity of the car?

8)A force of 10 N is applied to a box of unknown mass. The box is initially at rest is measured to have a velocity of 16 m/s after four seconds. What is the mass of the unknown box?

9)A 0.160 kg egg is dropped such that its velocity as it strikes the ground is 14 m/s. A high speed camera records the impact time of the egg as it smashes on the floor to be 20 ms. What is the force of impact?

10)The forces on a 2-kg book, initially at rest are graphed as a function of time shown below. Use the data below to answer the questions

10a)What is the impulse at 20 seconds?

10b)What is the velocity at 40 seconds?

Answers: 1

Show answers

Another question on Physics

Physics, 22.06.2019 09:10

Which lists the organs in the correct order as food passes from the mouth to anus?

Answers: 1

Answer

Physics, 22.06.2019 13:10

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)

Answers: 2

Answer

Physics, 22.06.2019 23:50

An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?

Answers: 2

Answer

Physics, 23.06.2019 02:30

Failure to accomplish erikson’s psychosocial task of late adulthood leads to despair. a. true b. false

Answers: 1

Answer

You know the right answer?

1)Developing
Write Newton’s 2nd Law, using algebra, manipulate the equation to get the impuls...

Questions