Question

If a body is moving in uniform motion, then there are no external forces acting on the body. Group of answer choices True or False

Answer #1

What is the net force acting on a body moving at a uniform
speed?

During a one-hour trip, a small boat travels 80.0 km
north and then travels 60.0 km east. The average velocity of the
boat was 100 km/h.
True or false
If a body is moving in uniform motion, then there are no
external forces acting on the body.
True or false
The force due to air resistance always opposes the
direction of motion.
True or false

The centripetal force acting on an object undergoing uniform
circular motion is the net force acting on the object. In this
experiment, the centripetal force is due to tension in the string.
In other scenarios, what forces can provide the centripetal force?
Describe at least two scenarios of uniform circular motion and name
the centripetal force in each. The best answers will be different
from the ones given in the Introduction.

Which of the following best describes the net force acting on an
object moving with uniform circular motion? Check all the apply
a. the net force acting on the object is away from the center of
the motion and the acceleration of the object os toward the center
of the motion
b. both net force acting on the object and the acceleration of
the object are away from the center of the motion
c. the net force acting on the...

true or false questions:
1. If a normal force is acting on a body, the normal force
will never be in the direction that the body is
moving.
2. A body can experience a weight force and have no
mass.
3. During a one-hour trip, a small boat travels 80.0 km north
and then travels 60.0 km east. The average velocity of the boat was
100 km/h.
4. A body undergoing projectile motion will always have
a constant acceleration.

Does the Earth constitute a system without any external forces
acting on it? Is the Earth’s momentum conserved? Explain your
answers.

would newton 2nd law of motion (F=ma) still be correct with
frictional forces acting on a system?

A force acting on a rigid body always causes both translation
and rotation of that body.
true or false

An astronaut is floating in outer space. There are no external
forces acting on the astronaut. The mass of the astronaut plus
his/her equipment is 60 kg. The astronaut is at rest with a wrench
in their hands. The astronaut then throws the wrench that weights 1
kg at 20 m s-1. The mass of the astronaut is now 59 kg. What is the
magnitude of the astronaut's velocity after he/she threw the
wrench?

Only two horizontal forces act on a 1.2 kg body. One force is
6.4 N, acting due east, and the other is 7.4 N, acting 64° north of
west. What is the magnitude of the body's acceleration?

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