The acceleration is 2.2 m/s^2 and the net force is 62N towards the right
<h3>What is the net force?</h3>
The net force is the effective force that acts on a body in a give direction.
1. The net force in the y axis is; ∑Fy = 0
2. The net force along the y axis is; ∑Fx = 277 N - 215 N
3. The normal reaction is given by; 28 kg * 9.8 m/s^2 = 274.4 N
4. The net force in the x axis is 277 N - 215 N = 62N towards the right
5. The acceleration of this force is obtained from;
F = ma
62 = 28 a
a = 62/28
a = 2.2 m/s^2
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Answer:
<u>Acceleration is 2 m/s² </u>
<u>Distance</u><u> </u><u>is</u><u> </u><u>1</u><u>0</u><u>0</u><u> </u><u>m</u>
Explanation:
From definition of acceleration, Acceleration is the rate of change in velocity.
• Simplifying the definition, or modifying it;

• Let's formulate symbols:

- a is acceleration
- v is final velocity, v = 20 m/s
- u is initial velocity, u = 0 m/s [ at rest ]
- t is time, t = 10 seconds

Distance = ut + ½at²
Distance = (0 × 10) + (½ × 2 × 10²)
Distance = 0 + 10²
Distance = 100 meters
Answer:
The CGS unit of force is the dyne, which is defined as 1 g⋅cm/s2, so the SI unit of force, the newton (1 kg⋅m/s2), is equal to 100000 dynes.
Explanation:
A. The ball's (vertical) velocity
at time
is

so that after 4 seconds, the ball's speed is

(The velocity is -10 m/s, so the ball is falling back down at this point.)
B. At maximum height, the ball has zero velocity, so it takes

for the ball to reach this height.
C. The height of the ball
at time
is

The maximum height is attained by the ball at 3 seconds after it's thrown, so

D. The time it takes for the ball to reach its maximum height is half the time it spends in the air. So the total airtime is
.
Put another way: When the ball returns to the height from which it was thrown, its final velocity has the same magnitude as its initial velocity but points in the opposite direction. This is to say, after the total time the ball is in the air, it's final velocity will be -30 m/s. Then the total airtime is

Put yet another way: Solve
for
. I don't see a need to elaborate...