The acceleration of a rocket is a = -bV, where V is the speed of exhaust gases coming out of the thruster. What are the SI units of b? kg /s O 1/s? m/s? m³ / s² O 1/s none of these

Use the following information to answer the next two questions The year is 1927. You are a crime scene investigator. You are considering pressing reckless driving charges against the driver of Car 2. To do this, you must find the speed of Car 2 before the crash. Allegedly, Car 1 was parked, when Car 2 crashed into it. Using the skid pattern, you determine that the speed of the two joined vehicles was 17 m/s immediately following the impact. Car 1 has mass of 1800 kg and Car 2 has a mass of 1100 kg.

Kinetic energy KE (Chapter 5) has dimensions kgm2/s2. It can be written in terms of the momentum p (Chapter 6) and mass m as KE = p2/2m (a) Determine the proper units for momentum (p) using dimensional analysis. (b) Refer to Problem 2. Given the units of force, write a simple equation relating a constant force F exerted on an object, an interval of time t during which the force is applied, and the resulting momentum of the object, p.

In this problem we will observe how the momentum of an electron changes as its velocity approaches the speed of light. The mass of an electron is 9.109 × 10-31 kg.   Part (a)  First, what is the momentum of an electron which is moving at the speed of a car on a highway, say 29 m/s, in kilogram meters per second?

An ecologist finds that the number of acres to which an animal confines its motion depends on the 1.41 power ofthe animal’s mass. Find the particular equation when an 80 kilogram deer is observed to confine itself to 2000 acres.Suppose you find evidence of a Tasmanian devil spread over a range of 3000 acres. What its calculated mass to thenearest kilogram?

Given vector A=2i-3j and vector B = 2i -4j. If vector C = A -2*B then C equals ..

v (m/s) 1.0 0.5 t (s) 0.60 0.20 0.40 FIGURE P2.18

If velocity =−12i + 21.5j m/s, how fast is it moving? (Express the answer to two significant figures).

What is the average value g we get after we complete the data table? Values are: 10.29 m/s2 9.25 m/s2 8.68 m/s2

An object's velocity as a function of time in one dimension is given by the expression; v(t) =  3.8t + 6.68 where are constants have proper SI Units. At what time is the object's velocity 61.2 m/s?