Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

4. A 900-kg compact car moving at 60 mi/hr has approximately 320 000 j oules of kinectic energy . Estimate its new kinectic energy if it is moving at 30 mi/hr.

4. A 900-kg compact car moving at 60 mi/hr has approximately 320 000 joules of kinectic energy. Estimate its new kinectic energy if it is moving at 30 mi/hr.

Grade:9

1 Answers

Arun
25763 Points
3 years ago
The KE is directly related to the square of the speed. If the speed is reduced by a factor of 2 (as in from 60 mi/hr to 30 mi/hr) then the KE will be reduced by a factor of 4. Thus, the new KE is (320 000 J)/4 or 80 000 J.

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free