I need help with a few introductory physics prelab questions. 1) An object moves

Question

I need help with a few introductory physics prelab questions.

1) An object moves 15 meters in 3 seconds. What is its velocity (in m/s)?

2)What is the velocity (in cm/s) of an object which moves 44 m in 2 s?

3) The charge of an electron is -1.60x10-19 C. Determine the charge to mass ratio of the electron (in 1011 C/kg). (Hint: divide the electron's charge by its mass; the answer is a negative number with a positive exponent)

4) What is the average velocity (in kilometers per hour) of a cart that travels 100 km in 5 hours?

Explanation / Answer

1) object moves 15 m in 3 seconds

velocity = 15/3 = 5 m/s

2) velcoity = 44/2 = 22m/s

= 2200cm/s

3) charge / mass = (1.6*10^-19) / (9.1*10^-31) = 1.75*10^11 C/kg

4) average velocity = distance / time = 100/5 = 200 km/h

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.