When a bicycle tire gets mud on it, the tire becomes slippery. What does the mud do to the tire?A.It decreases the force of gravity.B.It increases the force of friction.C.It decreases the force of friction.D.It increases the force of gravity.

Kelly was riding her bicycle. She noticed that when she stopped pedaling she begin to slow down. What force acting on her bicycle to slow her down?ALaw of inertiaBrolling frictionCsliding frictionDfluid friction

Explain why worn-out tyres increase the braking distance of a vehicle.Write 3-4 sentences in your answer.

7. A student measures the air pressure inside her bicycle tires before and after she goes on a long bike ride. What will she most likely observe.1 pointThe pressure in both tires is lower after the ride.The pressure in both tires is higher after the ride.The pressure in the front tire is higher after the ride, and the pressure in the back tire is lower after the ride.The pressure in the back tire is higher after the ride, and the pressure in the front tire is lower after the ride.

Angela and her sister visited a village and noticed that steps were cut into some slopes and grass was planted on them.The village chief mentioned that the grass was planted to help prevent soil erosion during heavy rains. Soil erosion occurs when the layers of soil wear away due to strong winds, hard rains and flowing water.How do the grasses help prevent soil erosions on the slopes?The ___________ of the grass hold the soil together. Thus, even if rainwater flows down the slopes, the soil will not get washed away.

A car is moving on a wet road. Which of the following actions would be most effective in preventing skidding? Increasing the speed of the car. Decreasing the speed of the car. Increasing the weight of the car. Decreasing the weight of the car.