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raketka [301]
2 years ago
10

Is work done in this example: A student lifting a heavy backpack off of the floor.

Physics
2 answers:
vagabundo [1.1K]2 years ago
4 0
I don't know what u mean
Maru [420]2 years ago
3 0
You need to add more explaintion of what you are talking about
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I need heelp can anyone heelp me plz
GuDViN [60]

Answer:

e) 1.04

Explanation:

7 0
2 years ago
a bug is flying with a velocity of 10m/s into a wind at 3m/s what is the resultant velocity of the bug?
V125BC [204]
10m/s - 3m/s = 7m/s

The resultant velocity is 7m/s
4 0
2 years ago
39. What is the change in momentum for a 5,000 kg ship in
Ivan

Answer:

Change in momentum is zero.

Explanation:

The following data were obtained from the question:

Mass (m) = 5000 kg

Time (t) = 1 h

Net force (F) = 0

Change in momentum =?

Force = Rate of change of momentum

0 = change in momentum

Change in momentum = 0

We can see from the above illustration that the net force is zero. Thus, the change in momentum is also zero.

6 0
2 years ago
Multiple Intelligences :
vlada-n [284]

Answer:

all of the above

PLS MARK ME AS BRAINLIAST

8 0
3 years ago
A 26-g steel-jacketed bullet is fired with a velocity of 630 m/s toward a steel plate and ricochets along path CD with a velocit
Alecsey [184]

Answer:

  F = - 3.53 10⁵ N

Explanation:

This problem must be solved using the relationship between momentum and the amount of movement.

          I = F t = Δp

To find the time we use that the average speed in the contact is constant (v = 600m / s), let's use the uniform movement ratio

        v = d / t

        t = d / v

Reduce SI system

          m = 26 g ( 1 kg/1000g) = 26 10⁻³ kg

          d = 50 mm ( 1m/ 1000 mm) = 50 10⁻³ m

Let's calculate

         t = 50 10⁻³ / 600

         t = 8.33 10⁻⁵ s

With this value we use the momentum and momentum relationship

        F t = m v - m v₀

As the bullet bounces the speed sign after the crash is negative

       F = m (v-vo) / t

       F = 26 10⁻³ (-500 - 630) / 8.33 10⁻⁵

       F = - 3.53 10⁵ N

The negative sign indicates that the force is exerted against the bullet

5 0
3 years ago
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