What is the kinetic energy of a 5-kg object moving at 7 m/s?

1 answer:

6 0

To answer this question, we would need the formula for the kinetic energy which is Kinetic Energy = ½ x m x v^2

Where the following means: m is the mass of the object and v is the velocity

So At 7 m/s: Kinetic Energy = ½ x 5 x 7^2 = 122.5 J is the answer

You might be interested in

An archer needs to hit a bullseye on a target at eye level of 60ft away. If the archer fires the arrow from the eye level with a

ohaa [14]

The time of fly of a projectile to the same level as it was launched is 2(v_y)/g=2(47sin(25))/g. We multiply this by the v_x to get the distance. Thus, the distance is <span>2(47sin(25))/g*47cos(25)=86.2. This is a overshoot!</span>

7 0

3 years ago

A car of mass 960.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 51.1 km/hr (14.2 m/s),

blagie [28]

Answer:

$0.27 m/s^2$

Explanation:

The power supplied by the engine is given by

P = Fv

where

F is the force applied

v is the velocity of the car

Here we have

P = 3700 W

v = 14.2 m/s

So we can solve the equation to find the average force:

$F=\frac{P}{v}=\frac{3700 W}{14.2 m/s}=260.6 N$

The net force applied on the car is also equal to

F = ma

where

m = 960.0 kg is the mass of the car

a is the acceleration

Re-arranging the equation, we find the acceleration:

$a=\frac{F}{m}=\frac{260.6 N}{960.0 kg}=0.27 m/s^2$

5 0

3 years ago

Penny placed a tablet of baking soda in a cup of water. The tablet immediately began to bubble, fizz, and eventually dissolve. D

dangina [55]

Answer:

Explanation:

Add as Brainliest

5 0

3 years ago

what is relative velocity in one dimension if va and vb are the velocities of two body a and b respectively then prove vab=va -v

motikmotik

Answer:

Relative velocity is nothing but the velocity of one body with respect to the velocity of some other body.

Explanation:

Relative velocity may be defined as the rate at which the change of separation takes place between any two object.The relative velocity of any object A w.r.t. another object B when they are in motion is nothing but the rate of change of their position from one another.

Now, let the velocity of object A be $v_A$