Saturday
April 19, 2014

Homework Help: Physics

Posted by Lee on Friday, October 5, 2007 at 12:54pm.

1.A race car has a mass of 707 kg. It starts from rest and travels 42.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?


2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the propellers?


3.A dragster starts with zero velocity and completes a 404.8 m (0.2530 mile) run in 4.915 s. If the car had a constant acceleration, what would be its acceleration and final velocity?


4.Suppose 70 kg boy and a 50 kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface, as in figure 4-21. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.


5.On Earth, a scale shows that you weigh 645 N.
What is your mass?
What would the scale read on the moon (g = 1.60 m/s2)?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - 1.A race car has a mass of 707 kg. It starts from rest and travels 42....
Physics - 1.A race car has a mass of 707 kg. It starts from rest and travels 42....
physics5 - A race car has a mass of 707 kg. It starts from rest and travels 40 m...
physics - A race car has a mass of 705 kg. It starts from rest and travels 39.0 ...
Physics - A race car has a mass of 715 kg. It starts from rest and travels 38.0 ...
physics =) - A race car has a mass of 710 kg. It starts from rest and travels 40...
Physics - A race car has a mass of 714 kg. It accelerates uniformly from rest, ...
physics 11 - A 1200 kg car on a horizontal surface starts from rest and ...
physics - A 1200 kg car on a horizontal surface starts from rest and ...
physics - A 800. kg car starts from rest and accelerates uniformly to 19.0 m/s ...

Search
Members