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 08:30

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Answers: 3

Answer

Physics, 22.06.2019 11:00

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

Answers: 1

Answer

Physics, 22.06.2019 18:10

Of is j/kg·k. if a 2.6 kg of isk to k,is ?

Answers: 1

Answer

Physics, 22.06.2019 19:30

Contains chemical energy. a. heat b. light c. natural gas

Answers: 2

Answer

You know the right answer?

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