Question

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.

Answer #1

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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

true or false questions
1. A body can have mass, but experience zero weight
force.
2. The force due to air resistance always
opposes the direction of motion.

Are the following true or false? Please explain why.
1. an object undergoing projectile motion always has kinetic
energy.
2. A static friction force always oppose the direction of motion
of the body that it acts on.
3. When a body is moving in uniform circular motion, it has a
constant kinetic energy.
4. Energy is neither created, nor destroyed, it is only
transformed; unless a non-conservative force acts on the body.
5. A body with mass always experiences a...

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?

Show all work and diagrams necessary. Please make sure
you show how you derive any equations you used!!!
Which of the following statements best describes "free
fall motion."
Free fall motion describes any horizontal
motion.
Free fall motion is two dimensional motion.
Free fall motion is a subset of projectile
motion.
Free fall motion is a subset of circular
motion.
A body can experience a static friction force in its
direction of motion.
True
False
If a normal force is...

Problem 1: An air-boat.
Rangers at the everglades national park, ride an air-boat, the
mass of the air boat plus the rangers is 500 kg. The blades of the
boat push on the air with 1000N, while moving the rangers
experience an air resistance force of 200N directed opposite to the
direction of motion, and the boat a water resistance of 250N. They
move in straight line for 20s. Please complete the following
tasks:
Draw the free-body diagram showing all...

1. First you walk 5.38 m in a direction 35.0 degrees north of
east. Then you walk 8.50 m in a direction 60.0 degrees south of
east. What is your total displacement for
this trip, both magnitude and direction?
2. You fly from New York City to Los Angeles with a stopover in
Chicago. The entire trip takes 7 hours and 15 minutes, with the
stopover in Chicago lasting 1 hour and 10 minutes. What was the
magnitude of your...

A) in the SI system, the unit of measurement for weight
is the:
slug;
kilogram (kg);
pound (lb);
newton (N).
B) Newton’s 2nd Law of Motion states that
acceleration will be greatest if:
the object’s mass is small and the applied force is large;
the object’s mass is small and the applied force is small;
the object’s mass is large and the applied force is large;
the object’s mass is large and the applied force is small.
C) For a...

For Each Question:
- Mark As True or False
- Give Reason
- Prove Your Answer By An Example
1. The magnitude of the average velocity is not the average
speed.
2. The magnitude of the instantaneous velocity is the
instantaneous speed.
3. The word deceleration means always slowing down.
4. The acceleration of a projectile at the top of its
trajectory is zero. While the velocity at the top of the motion of
an object thrown upward momentarily goes...

The Normal force always opposes the Weight force.
A.)True
B.)False
If a ball on a string is being spun around in a circle that is
perpendicular to the ground, at what point of the ball’s motion is
it being pulled on by the rope the hardest?
A.)At the bottom
B.)At the top
C.)45 degrees from top
D.)90 degrees from top

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