accelerates from rest to a speed of 15 m/s in 5.0 seconds? A man weighs 900 newtons standing on a scale in a stationary elevator. If some time later the reading on the scale is 1200 newtons, describe the motion and direction of the elevator. 5. force of 3E causes

accelerates from rest to a speed of 15 m/s in 5.0 seconds? A man weighs 900 newtons standing on a scale in a stationary elevator. If some time later the reading on the scale is 1200 newtons, describe the motion and direction of the elevator. 5. force of 3E causes

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter7: Gravity

Section: Chapter Questions

Problem 45PQ: Figure P7.45 shows a picture of American astronaut Clay Anderson experiencing weightlessness on...

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Question

help with question number 5

How does the force applied to an object affect its
acceleration?
What is the key to winning a tug of war?
A 50.0 kg object in outer space is attracted to a nearby
planet with a net force of 400 newtons. What is the
magnitude of the object's acceleration?
a=Fnet/m
* Assessment/Homework:
How much thrust must a 3.0 x 10* kg jet plane develop to achieve an
acceleration of 1.5 m/s2?
What acceleration will be produced by a force of 2.0 x 10' N on a 1.0 x 10' kg
cart?
1.
2.
3.
Two forces are applied to a 2.0 kg block on a frictionless, horizontal surface.
F, = 2.0 N
F, = 8.0 N
2.0 kg
Frictionless Surface
What is the acceleration of the block?
What is the magnitude of the net force acting on a 2.0 x 10 kg car as it
accelerates from rest to a speed of 15 m/s in 5.0 seconds?
A man weighs 900 newtons standing on a scale in a stationary elevator. If
some time later the reading on the scale is 1200 newtons, describe the motion
and direction of the elevator.
4.
5.
A net force F causes mass mj to accelerate at rate a. A net force of 3F causes
mass m2 to accelerate at rate 2a. What is the ratio of mass m, to mass m2?
A 0.60 kg softball initially at rest is hit with a bat. The ball is in contact with
the bat for 0.20 second and leaves the bat with a speed of 25 m/s. What is the
magnitude of the average force exerted by the ball on the bat?
A 1.2 x 10° kg car is accelerated uniformly from 10 m/s to 20 m/s in 5.0
seconds. What is the magnitude of the net force acting on the car during this
5.0 second interval?
A net force of 5.0 x 10´ newtons causes an object to accelerate at a rate of 5.0
m/s. What is the mass of the object?
6.
7.
8.
9.

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