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Troyanec [42]
2 years ago
11

A car moving at 60 mph slams on its brakes to stop before hitting a deer. Another identical car traveling at 60 mph slows to a s

top at a stop sign. Who experiences the greatest impulse during the stop
Physics
1 answer:
ankoles [38]2 years ago
8 0

Happy Holidays!

Recall that:

Impulse = Change in Momentum = mass × change in velocity

Since both cars are identical and have the same initial velocity of 60 mph, them breaking to a stop means that they both experience the same change in velocity.

Thus, both of the cars' impulses are equal.

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if a horse exerts a pulling force on a cart, is the reaction force the force of friction between the horse's feet and the road?
Assoli18 [71]

Answer:

A horse pushes the ground in a backward direction. According to Newton’s third law of motion, a reaction force is exerted on the horse in the forward direction. When the horse walks in the forward direction (with the cart attached to it), it exerts a force in the backward direction on the Earth. An equal force in the opposite direction (forward direction) is applied on the horse by the Earth. This force moves the horse and the cart forward. As a result, the cart moves forward.

6 0
2 years ago
A rock is dropped from rest. How fast is it going after it has been falling for 9.2 s?
natka813 [3]

90.2 m/s. A rock dropped from rest after it has falling for 9.2 seconds will have a velocity of 90.2m/s.

The bodies left in free fall increase their speed (downwards) by 9.8 m/s² every second. The acceleration of gravity is the same for all objects and is independent of the masses of these. In the free fall the air resistance is not taken into account.

v = g*t

v = (9.8m/s²)(9.2s) = 90.2 m/s

6 0
3 years ago
Which statement below BEST explains global warming?
vodka [1.7K]

The correct answer is A. an increase in Earth's average surface temperature.

While all of these are aspects of global warming, option A best summarizes it.

6 0
2 years ago
Which instrument is used to measure the height of a 20 litre jerrican​
Lynna [10]

tape measure?

Hope that helped!!! k

7 0
3 years ago
Read 2 more answers
A 25 newton force applied on an object moves it 50 meters. The angle between the force and displacement is 40.0 degrees. What is
zvonat [6]
Work done is when a force is exerted to cause a displacement in a certain object. 
the equation for work done ;
work done = force applied * displacement of the object 
when the force applied is not in the same direction as that of the displacement of the object then the effect of the force is not its whole value. The force is then applied at an angle to that of the displacement of the object, then the resultant force is the force exerted* cos of the angle between force and displacement, in this instance the angle is 40 °.
the new equation is then;
work done = force cos 40° * displacement
after substitution,
work = 25 N * 0.76 * 50 m
         = 957.55 J
round it off
         = 9.6 *10² J
the correct answer is B
5 0
3 years ago
Read 2 more answers
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