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Margarita [4]
3 years ago
7

Ben Rushin is waiting at a stop light. Turns green, ben accelerated from rest at a rate of 6.00 m/s squared for a time of 4.10 s

econds.
Determine the displacement of Ben's car during this time period. Use the formula to find a solution: d=vt +1/2 at squared
Physics
1 answer:
Lera25 [3.4K]3 years ago
4 0
D= vt +.5at^2
since he started at rest, v (initial velocity) is 0
so d=.5at^2
d = .5 (6m/s^2) (4.1s)^2 
then put that into a calculator.

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A golf club with mass 0.5 kg is swung at 23 m/s toward a stationary golf ball on a tee. The club barely slows down to 17 m/s, bu
mylen [45]

Answer:

I gotchu fam. 0.0435 kg

Explanation:

m1v1+m2v2=m1v1f+m2v2f

(0.5)(23)+(m2)(0)=(0.5)(17)+(m2)(69)

11.5=8.5+69m2

3=69m2

0.0435 kg

5 0
2 years ago
what us the velocity in meters per second of a runner who runs exactly 110 m toward the beach in 72 secs
finlep [7]

Velocity = Distance / time taken

   =  110 m /72s

     1.52  ms⁻¹

4 0
3 years ago
A ballet dancer spins with 2.4 rev/s with her arms outstretched,when the moment of inertia about axis of rotation is 1 .With her
kow [346]

Correct question is;

A ballet dancer spins with 2.4 rev/s with her arms outstretched,when the moment of inertia about axis of rotation is I. With her arms folded,the moment of inertia about the same axis becomes 0.6I about the same axis. Calculate the new rate of spin.

Answer:

4 rev/s

Explanation:

We are given;

Initial Angular velocity; ω_i = 2.4 rev/s

Initial moment of inertia; I_i = I

Final moment of inertia; I_f = 0.6I

From conservation of angular momentum, we have;

I_i × ω_i = I_f × ω_f

Where ω_f is the new rate of spin.

Thus, let's make it the subject to get;

ω_f = (I_i × ω_i/I_f)

Plugging in relevant values, we have;

ω_f = (I × 2.4/0.6I)

I will cancel out to give;

ω_f = 2.4/0.6

ω_f = 4 rev/s

5 0
3 years ago
A body cycles continously through a distance of 10km in 5 mins. calculate its average speed​
stira [4]

Answer:

distance=10km=10*1000=10000m

time=5min=5*60=300sec

average speed=distance/time

= 10000/300=33.33m/s

Explanation:

3 0
3 years ago
A 1000-watt microwave oven takes 90 seconds to heat a bowl of soup.How many joules if energy does it use?
vodomira [7]

Answer:

1 joule is 1 watt second

Explanation

Here 1000 x 90 watt seconds 90000= 90000 joules.

3 0
3 years ago
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