A car’s engine provides a forward force of 2000 N while the force of air resistance is 800 N in the opposite direction. With what force will the car move, and in which direction?(1 point)
Responses
1200 N forward
1200 N forward
16000 N forward
16000 N forward
2800 N forward
2800 N forward
1200 N backward
The answer is:
mass
The car's engine provides a forward force of 2000 N, while the force of air resistance is 800 N in the opposite direction. To determine the overall force, we subtract the force of air resistance from the force of the engine. Thus, the overall force will be 2000 N - 800 N = 1200 N forward. Therefore, the car will move with a force of 1200 N in the forward direction.
what is th answer
The correct answer is:
1200 N forward
Two movers are attempting to push a couch up a ramp. One mover applies a force of 80 N to the right, but the force of friction between the couch and the ramp is providing a force of 110 N in the opposite direction, and the couch slides down the ramp.
At minimum, how much force will the second mover need to apply to help push the couch up the ramp?
(1 point)
Responses
31 N
31 N
110 N
110 N
30 N
30 N
80 N
To determine the minimum force the second mover needs to apply, we need to consider the net force acting on the couch. The first mover applies a force of 80 N to the right, but the force of friction is providing a force of 110 N in the opposite direction.
To counteract the force of friction and start moving the couch up the ramp, the second mover needs to apply a force equal in magnitude but in the opposite direction.
Therefore, the second mover needs to apply a force of 110 N in the forward direction.
The correct answer is:
110 N.
A group of students conduct an experiment to study Newton’s second law of motion. They applied a force to a toy car and measure its acceleration. The table shows the results.
Force (N) Acceleration (m/s²)
2.0 5.0
3.0 7.5
6.0 15.0
If the students graph the data points, which conclusion will they be able to make?
(1 point)
Responses
The data points will fall along a line. This shows that as the force increases, the acceleration decreases.
The data points will fall along a line. This shows that as the force increases, the acceleration decreases.
The data points will fall along a line. This shows that as the force increases, the acceleration increases.
The data points will fall along a line. This shows that as the force increases, the acceleration increases.
The data points will not fall along a line. This shows that as the force increases, the acceleration increases.
The data points will not fall along a line. This shows that as the force increases, the acceleration increases.
The data points will not fall along a line. This shows that as the force increases, the acceleration decreases.
Use the image to answer the question below.
In the experimental setup shown, a car has one end of a string attached to it, and the other end is attached to a fixed number of metal discs. The car moves along the table and two probes sense the motion of the car. The probes send information to a computer that displays the acceleration and velocity of the experiment. When looking at these results, which quantity stays constant during the trials?
A car at the one end of the table is tied to a hanger at the other end of the table using a string and a pully. The hanger is hanging over the side of the table while the car is placed flat on the surface of the table. The hanger can support the metal discs. A ruler, a laptop, and other equipment are also placed on the table.
(1 point)
Responses
mass
mass
velocity
velocity
force
force
acceleration
acceleration
Based on the given information, the quantity that stays constant during the trials is the mass of the car.
The other options, velocity, force, and acceleration, can vary depending on the motion of the car. However, the mass of an object is a constant property that does not change unless modified deliberately.