A 420-N force acts on a 400-N object, and the force is from the north.
In which direction will the object move?
Responses
backward
backward
forward
forward
north
north
south
south
The object will move in the forward direction.
What is the correct interpretation of this diagram?
Responses
Up and down forces are balanced. The object does not move.
Up and down forces are balanced. The object does not move.
Forces from the left and the right are unbalanced. The object moves left.
Forces from the left and the right are unbalanced. The object moves left.
Up and down forces are balanced. The force toward the right is greater than the force toward the left. The object will move toward the left.
Up and down forces are balanced. The force toward the right is greater than the force toward the left. The object will move toward the left.
Up and down forces are balanced. The force toward the right is greater than the force toward the left. The object will move toward the right.
The correct interpretation of this diagram is:
Forces from the left and the right are unbalanced. The object moves left.
A 150-kg object takes 90 seconds to travel a 2,500-meter straight path. It begins the trip traveling 120 meters per second and decelerates to a velocity of 20 meters per second.
What was its acceleration?
Responses
−1.11 m/s2
negative 1.11 meters per second squared,
−0.3 m/s2
negative 0.3 meters per second squared,
+1.11 m/s2
plus 1.11 meters per second squared,
+80 m/s2
To calculate the acceleration, we can use the formula:
acceleration = (final velocity - initial velocity) / time
Substituting the given values:
acceleration = (20 m/s - 120 m/s) / 90 s
acceleration = (-100 m/s) / 90 s
acceleration = -1.11 m/s²
So, the correct answer is:
−1.11 m/s²
A pumpkin with a mass of 2.5 kg was pushed toward a wall. The average acceleration of the pumpkin was 10.7 m/s2.
How much force was applied to the pumpkin to make it move?
Responses
4.28 m/s2
4.28 meters per second squared,
4.28 N
4.28 N
26.75 m/s2
26.75 meters per second squared,
26.75 N
26.75 N
To calculate the force applied to the pumpkin, we can use the formula:
force = mass x acceleration
Substituting the given values:
force = 2.5 kg x 10.7 m/s^2
force = 26.75 N
So, the correct answer is:
26.75 N.